System and method for compartment control

ABSTRACT

A system and method for controlling an overhead stowage bin compartment in a mobile platform, such as a commercial aircraft. A motor is operatively coupled to the compartment for moving the compartment between open and closed positions. A remotely located control system is in communication with the motor and supplies a current signal to the motor to drive the motor. The control system monitors operation of the motor and senses when the compartment is obstructed by sensing the current being supplied to the motor. The control system also senses a position of the compartment and, along with the computed required current, uses this information to determine if the weight of the compartment exceeds a predetermined maximum threshold.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is related in general subject matter to pendingU.S. patent application Ser. No. ______ (Attorney Docket No.7784-000904), filed concurrently herewith, entitled “System and Methodfor a Power-Assisted Compartment,” assigned to The Boeing Company, andhereby incorporated by reference in its entirety into the presentapplication. The present application is further related in generalsubject matter to pending commonly assigned U.S. patent application Ser.No. ______ (Attorney Docket No. 7784-000912CPA), filed concurrentlyherewith, entitled “System and Method for Pivot for Stowage Compartmentsor Rotating Items,” hereby incorporated by reference in its entiretyinto the present application. Additionally, the present application isrelated in general subject matter to pending commonly assigned U.S.patent application Ser. No. 10/905,502, filed on Jan. 7, 2005, entitled“Pivot Mechanism for Quick Installation of Stowage Bins or RotatingItems,” hereby incorporated by reference in its entirety into thepresent application.

The present application is also related in general subject matter topending commonly assigned U.S. patent application Ser. No. ______(Attorney Docket No. 7784-000910), filed concurrently herewith, entitled“System and Method for Electronic Indicative Switch,” herebyincorporated by reference in its entirety into the present application.In addition, the present application is related in general subjectmatter to pending commonly assigned U.S. patent application Ser. No.______ (Attorney Docket No. 7784-000913), filed concurrently herewith,entitled “System and Method for Compartment Control,” herebyincorporated by reference in its entirety into the present application.The present application is also related in general subject matter topending commonly assigned U.S. patent application Ser. No. ______(Attorney Docket No. 7784-000909), filed concurrently herewith, entitled“System and Method for Compartment Control,” hereby incorporated byreference in its entirety into the present application. The presentapplication is also related in general subject matter to pendingcommonly assigned U.S. patent application Ser. No. ______ (AttorneyDocket No. 7784-000928), filed concurrently herewith, entitled “Systemand Method for Electronically Latching Compartments,” herebyincorporated by reference in its entirety into the present application.

FIELD

The present disclosure relates generally to stowage systems, and moreparticularly to a system and method for control of a movable stowagecompartment on a mobile platform.

BACKGROUND

The statements in this section merely provide background informationrelated to the present disclosure and may not constitute prior art.

Many mobile platforms (such as trains, ships, aircraft and automobiles)employ stowage compartments in a cabin of the mobile platform to enablestowage of passenger items, such as carry-on baggage. With regard tocommercial passenger aircraft, increased baggage stowage demands haverequired the stowage compartments to increase in size and load capacity.In addition, there is a drive to increase passengers “personal space”(i.e., headroom) in the cabin of the aircraft. The desire for increased“personal space” in the cabin has resulted in higher ceilings and theplacement of storage compartments higher in the cabins.

The increased size and load capacity of the stowage compartments coupledwith the higher cabin ceilings and higher stowage compartment placementin the cabins can make it difficult for some passengers to close thedoor on the overhead stowage compartments. Further, if the compartmentsare fully loaded, the weight of the overhead stowage compartments cancause strain on the passengers or crew who attempt to open or close theoverhead stowage compartments. This is especially so if passengercarry-on baggage is to be placed on the inside surface of the opencompartment door, in which case the user will need to lift the weight ofthe all of the baggage that is being supported by the compartment dooras the user lifts the door to close it. In addition, current compartmentstowage systems are not capable of being managed through a control panelsuch that crew members can operate the stowage compartments remotelyand/or remotely assess various operating conditions affecting theindividual compartments. Thus, it would be desirable to have apower-assisted overhead stowage compartment system to assist passengersand crew in opening and closing the overhead stowage compartments, andthat is also capable of being controlled (and/or monitored) remotely bycrew members.

SUMMARY

A system and method for controlling at least one moveable stowagecompartment is provided. The method includes providing a motive deviceoperably associated with the compartment and sensing a current suppliedto the motive device to move the compartment. The method also includesdetermining if the current exceeds a threshold, and determining that thecompartment is obstructed if the current exceeds the threshold.

In one embodiment, the present disclosure further provides a method formonitoring a movable stowage compartment on a mobile platform. Themethod includes providing a motor coupled to the compartment and sensinga current supplied to the motor. The method also includes sensing aposition of the compartment, and computing the weight of the compartmentbased on the sensed position of the compartment and the computedrequired current. The method includes signaling if the weight of thecompartment exceeds a weight limit threshold.

The present teachings also provide a method for controlling theoperation of a moveable overhead stowage compartment on a mobileplatform. The method includes sensing a position of the compartment froma location remote from the compartment, and determining a status of thecompartment from the remote location. The method also includesgenerating signals from the remote location to a motive deviceassociated with the compartment to move the compartment based on thesensed position and the status of the compartment.

Also provided is an aircraft including a fuselage. The aircraft alsoincludes an overhead stowage compartment located within the fuselage,with the overhead stowage compartment being movable between an openedposition and a closed position. The aircraft further includes a motivedevice operatively associated with the compartment for moving thecompartment between the opened and closed positions, and a controlsystem located remotely from the compartment and in communication withthe motive device. The control system generates a current to drive themotive device, and includes a subsystem to sense the current driving themotor. The control system uses the computed required current todetermine an operational status of the compartment.

Further areas of applicability will become apparent from the descriptionprovided herein. It should be understood that the description andspecific examples are intended for purposes of illustration only and arenot intended to limit the scope of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will become more fully understood from thedetailed description and the accompanying drawings, wherein:

FIG. 1 is a perspective view of a portion of a mobile platformincorporating one exemplary embodiment of the system and method for apower-assisted compartment, and illustrating a plurality ofpower-assisted compartments according to the present disclosure;

FIG. 2 is a schematic diagram of a control system for the plurality ofpower-assisted compartments of FIG. 1;

FIG. 3 is a perspective view of a single power-assisted compartmentaccording to one embodiment of the present disclosure in an opened andunlatched position;

FIG. 4 is an exploded perspective view of the power-assisted compartmentof FIG. 3;

FIG. 5 is a side view of the power-assisted compartment of FIG. 3illustrating the power-assisted compartment in a closed and latchedposition;

FIG. 5A is a detail side view of a portion of the power-assistedcompartment of FIG. 5;

FIG. 6 is a side view of the power-assisted compartment of FIG. 3,illustrating the power-assisted compartment in a partially opened andunlatched position;

FIG. 7 is a side view of the power-assisted compartment of FIG. 3 in anopened and unlatched position;

FIG. 7A is an exploded detail view of a pivot system employed by thepower-assisted compartment of FIG. 1;

FIG. 8 is a rear view of the power-assisted compartment of FIG. 3;

FIG. 9 (System Control Module is a dataflow diagram illustrating anexemplary compartment control system of the present disclosure;

FIG. 10 (Compartment Initialization Procedure) is a flowchartillustrating a start-up method for the system of FIG. 9: (System ControlProcedure);

FIG. 11 (Control Module Test Procedure) is a flowchart illustrating afirst method for testing the control system;

FIG. 12 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 11 (Control Module Test Procedure) at A;

FIG. 13 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 12 (Control Module Test Procedure) at B;

FIG. 14 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 13 (Control Module Test Procedure) at C;

FIG. 15 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 14 (Control Module Test Procedure) at D;

FIG. 16: (Control Module Test Procedure) is a continuation of theflowchart of FIG. 15: (Control Module Test Procedure) at E;

FIG. 17 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 16 (Control Module Test Procedure) at F;

FIG. 18 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 17 (Control Module Test Procedure) at G;

FIG. 19 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 18 (Control Module Test Procedure) at H;

FIG. 20 (Control Module Test Procedure) is a continuation of theflowchart of FIG. 19 (Control Module Test Procedure) at I;

FIG. 21 (Hardware Test Procedure) is a flowchart illustrating a secondmethod for testing the system;

FIG. 22 is a continuation of the flowchart of FIG. 21: (Hardware TestProcedure) at A;

FIG. 23 (Control Module is a dataflow diagram illustrating a compartmentcontrol module for the system of FIG. 9 (System (Control Procedure);

FIG. 24 (Compartment Status Procedure) is a flowchart illustrating acompartment monitoring method;

FIG. 25 (Obstruction Monitoring Procedure) is a flowchart illustratingan obstruction monitoring method;

FIG. 26 (Fasten Seatbelt (FSB) Procedure) is a flowchart illustrating awarning sign monitoring method;

FIG. 26A (Volume Sensing Procedure A) is a flowchart illustrating avolume sensing method;

FIG. 27 (Speed (Current) Control Procedure) is a flowchart illustratinga method for determining a control current and speed of compartmentmovement;

FIG. 28 (“OPEN” Button Activation Procedure) is a flowchart illustratinga method for responding to a first input;

FIG. 29 (Power Management Procedure) is a flowchart illustrating a powermanagement method;

FIG. 30 (“CLOSE” Button Activation Procedure) is a flowchartillustrating a method for responding to a second input;

FIG. 31 (Manual Close Procedure) is a flowchart illustrating a methodfor responding to a third input;

FIG. 32 (Compartment Activation Procedure) is a flowchart illustrating afirst control method;

FIG. 33 (Halt Motion Procedure) is a flowchart illustrating a secondcontrol method;

FIG. 34 (Set Light/Indication Procedure) is a flowchart illustrating afirst indicator status update method;

FIG. 35 Set Light/Indication Procedure (FSB ON and Timed Out)) is aflowchart illustrating a second indicator status update;

FIG. 36 Set Light/Indication Procedure (FSB ON and Not Timed Out)) is aflowchart illustrating a third indicator status update method;

FIG. 36A (Compartment Range of Motion is a graph of the compartmentdirection and motion from the fully opened to the fully closedpositions;

FIG. 37 (System Shutdown Procedure) is a flowchart illustrating ashutdown method;

FIG. 38 illustrates a “Bin Control” screen including a “Control” screen;

FIG. 39 illustrates a control system and an alternative control system;

FIG. 40 illustrates a “Bin Control” screen including a “Settings”screen;

FIG. 41 illustrates a “Bin Control” screen including a “Settings” screenwith a “Zone Locator” selector displayed;

FIG. 42 illustrates a “Bin Control” screen including a “Security”screen;

FIG. 43 illustrates a “Password” prompt screen;

FIG. 44 illustrates a “Bin Control” screen including a “Configuration”screen;

FIG. 45 illustrates a “Bin Control” screen including a first“Configuration” screen;

FIG. 46 illustrates a “Bin Control” screen including a second“Configuration” screen;

FIG. 47 illustrates a “Bin Control” screen including a third“Configuration” screen;

FIG. 48 illustrates a “Bin Control” screen including a fourth“Configuration” screen;

FIG. 49 illustrates a “Bin Control” screen including a fifth“Configuration” screen;

FIG. 49A is a graph of the position, velocity and acceleration accordingto an Automatic profile;

FIG. 50 illustrates a “Bin Control” screen including a sixth“Configuration” screen;

FIG. 51 illustrates a “Bin Control” screen including a seventh“Configuration” screen;

FIG. 52 illustrates a “Bin Control” screen including an eighth“Configuration” screen;

FIG. 53 illustrates a “Bin Control” screen including a ninth“Configuration” screen;

FIG. 54 illustrates a “Bin Control” screen including a tenth“Configuration” screen;

FIG. 55 illustrates a “Bin Control” screen including an eleventh“Configuration” screen;

FIG. 56 illustrates a “Bin Control” screen including a twelfth“Configuration” screen;

FIG. 57 illustrates a “Bin Control” screen including a first “Indicator”screen;

FIG. 58 illustrates a “Bin Control” screen including a second“Indicator” screen;

FIG. 59 illustrates a “Bin Control” screen including a third “Indicator”screen.

FIG. 60 illustrates a “Bin Control” screen including a fourth“Indicator” screen;

FIG. 61 illustrates a “Cabin Settings” screen;

FIG. 62 is a perspective front view of a power-assisted stowagecompartment including an electronic indicative switch in accordance withone embodiment of the present disclosure;

FIG. 62A is a cross-sectional view of the electronic indicative switchof FIG. 62 taken along line 62A-62A of FIG. 62;

FIG. 63 is a perspective view of a rear surface of the electronicindicative switch of FIG. 62;

FIG. 63A is a front view of the electronic indicative switch of FIG. 62illustrating an illumination of the electronic indicative switchaccording to the present disclosure;

FIG. 63B is a cross-sectional view of the electronic indicative switchof FIG. 63A taken along line 63B-63B of FIG. 63A;

FIG. 64 is a partially exploded view of the electronic indicative switchof FIG. 62;

FIG. 64A is a fully exploded view of the electronic indicative switch ofFIG. 62;

FIG. 65 is a detailed perspective view of the electronic indicativeswitch of FIG. 62 in a first illuminated state;

FIG. 66 is a detailed perspective view of the electronic indicativeswitch of FIG. 62 in a second illuminated state;

FIG. 67 is a detailed electrical schematic of a printed circuit boardfor the electronic indicative switch of FIG. 62;

FIG. 68A is a rear view of the printed circuit board from an interior ofthe power-assisted stowage compartment;

FIG. 68B is a front view of the printed circuit board from an exteriorof the power-assisted stowage compartment;

FIG. 69 is a detailed circuit diagram for the printed circuit board froma first perspective;

FIG. 70 is a detailed circuit diagram for the printed circuit board froma second perspective;

FIG. 71 is a side view of the power-assisted compartment of FIG. 3,including an electronic latch in accordance with one exemplaryembodiment of the present disclosure;

FIG. 71A is a detail side view of the electronic latch of thepower-assisted compartment of FIG. 71 in a first, engaged position;

FIG. 71B is a detail perspective view of a portion of the latchingsystem of FIG. 71A in a second, disengaged position;

FIG. 71C is a detail perspective view of a portion of the latchingsystem of FIG. 71A;

FIG. 72 is an exploded perspective view of the power-assistedcompartment including the electronic latch of FIG. 71;

FIG. 73 is a side view of the power-assisted compartment in a partiallyopened and unlatched position, including the electronic latch of FIG.71;

FIG. 74A is a front view of a second alternative embodiment of anelectronic indicative switch;

FIG. 74B is a front view of a third alternative embodiment of anelectronic indicative switch;

FIG. 74C is a front view of a fourth alternative embodiment of anelectronic indicative switch;

FIG. 74D is a front view of a fifth alternative embodiment of anelectronic indicative switch;

FIG. 74E is a front view of a sixth alternative embodiment of anelectronic indicative switch;

FIG. 75 is a perspective view of a portion of a mobile platformillustrating a plurality of alternative stowage compartments includingan alternative electronic latch in accordance with one exemplaryembodiment of the present disclosure;

FIG. 76 is a perspective view of the alternative stowage compartment ofFIG. 75 in a closed and latched position;

FIG. 77 is a partially broken away side view of the alternative stowagecompartment of FIG. 75 illustrating the latching system in the closedand latched position;

FIG. 78 is a partially broken away side view of the alternative stowagecompartment of FIG. 75 illustrating the latching system in a partiallyopened and unlatched position; and

FIG. 79 is a side view of the alternative stowage compartment of FIG. 75illustrating the latching system in an opened and unlatched position.

DETAILED DESCRIPTION

The following description is merely exemplary in nature and is notintended to limit the present disclosure, application, or uses. Althoughthe following description is related generally to a power-assistedcompartment for a mobile platform (such as an aircraft, ship,spacecraft, train or land-based motor vehicle), it will be understoodthat the power-assisted compartment system, as described and claimedherein, can be used with any appropriate application where it would beuseful to have a power-assisted storage area or storage device.Therefore, it will be understood that the following discussion is notintended to limit the scope of the appended claims to only mobileplatforms.

With reference to FIG. 1, an exemplary mobile platform 10 employing apower-assisted compartment system 12 is shown. The mobile platform 10,in this example, is a passenger aircraft including a cabin 14 and a crewarea 16. The mobile platform 10 includes two rows, seven abreast, ofpassenger seating 18 with one row of four power-assisted compartmentsystems 12; however, any number of power-assisted compartment systems 12or rows of seating 18 could be employed.

With additional reference to FIG. 2, the power-assisted compartmentsystem 12 includes a control system 20, a support structure or system22, at least one or a plurality of compartments 24, a pivot system 25,an actuator system 26 and a latching system 28. It will be understoodthat although the present disclosure illustrates a plurality ofcompartments 24, the present disclosure could involve any number ofcompartments 24, and may just include one compartment 24 if desired.Furthermore, it will be understood that although the description hereinof the support system 22, actuator system 26 and latching system 28 isdirected towards an outboard compartment 24, the principles disclosedherein can be applied to any suitable compartment 24 in any orientation,such as inboard. Generally, each of the compartments 24 is incommunication with the control system 20, and the control system 20 isresponsive to each of the compartments 24. The support system 22supports the compartments 24 in the cabin 14. The actuator system 26 iscoupled to each of the compartments 24 to enable the compartments 24 torotate into an opened position (FIGS. 3, 6 and 7) and a closed position(FIG. 5). It will be understood, however, that although the compartments24 are described herein as rotating between an opened and closedposition the compartments 24 could also pivot, articulate or translatebetween the opened and closed position depending upon how the actuatorsystem 26 is coupled to the compartments 24. The latching system 28 isalso coupled to each of the compartments 24 and the support system 22 tosecure the compartments 24 in closed positions, or to permit thecompartments 24 to be rotated into their opened positions. In addition,it will be understood that although the actuator system 26 and latchingsystem 28 are illustrated and described as separate components, thesesystems could be integrated if desired.

With reference to FIG. 2, a schematic of the control system 20 isillustrated. The control system 20 includes a plurality of firstcontrollers or compartment controllers 30, a plurality of first oramperage sensors 34 (shown in phantom), a plurality of second orobstruction sensors 36 (shown in phantom), a plurality of third or opensensors 37, a plurality of fourth or position sensors 139, a pluralityof switch system(s) 40 each coupled to each of the compartments 24, aplurality of fifth or volume sensors 41, and a second controller orcentral controller 32 coupled to a multi-purpose control panel 33. Eachof the compartment controllers 30 are coupled to the compartments 24 atany desired location, but are preferably coupled to the compartments 24at a location not visible to passengers within the cabin 14. It shouldbe noted that although the following discussion describes thecompartments 24 as each having a compartment controller 30, onecompartment controller 30 could be in communication with and responsiveto a plurality of compartments 24. The compartment controllers 30 are incommunication with and responsive to the amperage sensors 34,obstruction sensors 36, open sensors 37, switch system(s) 40 and centralcontroller 32. The compartment controllers 30 are also responsive to andin communication with the actuator system 26 and the latching system 28to move the compartment 24 from an open and a closed position, and alsoto latch and unlatch the compartment 24, as will be described in greaterdetail herein. The compartment controllers 30 receive power from a mainpower source of the aircraft (not shown). The compartment controllers 30manage and distribute energy to the actuator system 26 and the latchingsystem 28. The compartment controllers 30 are in communication with andresponsive to the amperage sensors 34, obstruction sensors 36, opensensors 37, position sensors 139, switch system(s) 40, volume sensors41, central controller 32, actuator system 26 and latching system 28through either a wired, wireless or plumbed connection or anycombination thereof.

With additional reference to FIGS. 3 and 4, the amperage sensors 34generally monitor a weight of the compartment 24. Typically, the firstamperage sensors 34 are mounted with the actuator system 26 such thatthe amperage sensors 34 receive accurate measurements associated withthe weight of the compartment 24. The amperage sensors 34 are incommunication with the compartment controller 30 through either wired,wireless or plumbed communication to transmit the data regarding theweight of the compartment 24 to the compartment controller 30. Theamperage sensors 34 receive power from the compartment controller 30.The amperage sensors 34 can be any appropriate sensor for measuringweight or load on the compartments 24, such as, a strain gage, powersensor or load sensor. If an amperage sensor is used, the amperagesensor is coupled to the actuator motor system 126, as will be discussedin greater detail herein. If the weight of the compartment 24 receivedfrom the amperage sensors 34 is greater than a predetermined acceptableloading weight, the compartment controller 30 can either prevent themovement of the compartment 24 and/or issue a warning that thecompartment 24 is overloaded, as will be discussed in greater detailherein. Primary obstruction detection is also accomplished by acombination of the amperage sensors 34 and the position sensor 139. Inparticular, the amperage sensors 34 provide an accurate data measurementassociated with the load on the compartments 24, and a sudden increasein the load with reduced movement of the compartments 24 indicates anobstruction in the movement of the compartment 24. The position sensor139 will be discussed in greater detail herein with reference to thepivot system 25.

The obstruction sensors 36 are in communication with the compartmentcontrollers 30 to provide the compartment controllers 30 with a signalif the movement of the compartment 24 is obstructed, as best shown inFIG. 5. The obstruction sensors 36 provide secondary obstructiondetection. Generally, the obstruction sensors 36 are pinch strips that,as generally known, include two separated conductive surfaces thattransmit a signal when they are forced together. The obstruction sensors36 receive power from the compartment controller 30, and alternativelythrough the pivot system 25, as will be discussed in greater detailherein. It will be understood, however, that any otherelectro-mechanical device could be used to generate a signal based on anobstruction, and further, the actuator system 26 can be configured tofurther monitor for an obstruction, as will be discussed herein. Theobstruction sensors 36 are generally coupled to the support system 22and the compartment 24, as will be discussed in greater detail herein.It should be noted that although three obstruction sensors 36 areillustrated, any number of obstruction sensors 36 could be employed.

The open sensors 37 are coupled to the support system 22 and are adaptedto be in communication with the compartment 24. The open sensors 37 arein wired and/or wireless communication with the compartment controllers30 to provide the compartment controllers 30 with a signal if thecompartment 24 is in the full opened position. Generally, thecompartment 24 rests on the open sensors 37 when the compartment 24 isin the full open position, as will be described in greater detailherein.

The switch system(s) 40 can be coupled to each of the compartments 24,and are generally mounted on a front surface 44 of the compartments 24,such that the switch system(s) 40 face into the cabin 14 of the mobileplatform 10. The switch system(s) 40 includes a first, or “OPEN”, or“DOWN,” switch contact or button 46 and a second, or “CLOSE” or “UP,”switch contact or button 48 arranged about an indicator surface 50. Itshould be noted, however, that the switch system(s) 40 shown are forillustrated purposes, as any appropriate switch with any appropriatenumber of buttons could be employed. In addition, the OPEN button 46 andCLOSE button 48 could be placed in any appropriate orientation withrespect to each other, and with respect to the indicator surface 50,such as adjacent to each other. Typically, the switch system(s) 40 is inwired and/or wireless communication with the compartment controllers 30.The switch system(s) 40 receive power from the compartment controller30, and alternatively through the pivot system 25, as will be discussedin greater detail herein. In addition, the switch system(s) 40 can beenergy harvesting switches such that the switch system(s) 40 do notrequire an external source of power from the mobile platform 10 tofunction.

When the OPEN button 46 is depressed by a user, it sends a signal to thecompartment controller 30 to appropriately operate the compartment 24.For instance, if the compartment 24 is already in the fully closedposition, depressing the OPEN button 46 or CLOSE button 48 will causethe compartment controller 30 to lower the compartment 24. Further, ifthe OPEN button 46 or CLOSE button 48 is depressed while the compartment24 is in the process of moving from the opened to the closed position orvice versa, a signal will be sent to the compartment controller 30 tostop the operation or movement of the compartment 24. In order to resumeoperation or movement of the compartment 24, the user can then presseither the OPEN button 46 or the CLOSE button 48 for the respectivemovement of the compartment 24. In addition, the OPEN button 46 andCLOSE button 48 could each be programmable to send a series of signalsto the compartment controller 30, so that the compartment controller 30performs a specific operation, such as preventing the operation of thecompartment 24.

The indicator surface 50 is disposed between the OPEN button 46 and theCLOSE button 48, and comprises at least one or a plurality of lightemitting diodes (LEDs) 52. Generally, the indicator surface 50 comprisesthree LEDs 52, each of which are in communication with and responsive tothe compartment controller 30. The LEDs 52 can be in wired and/orwireless communication with the compartment controller 30. Typically,the LEDs 52 can be different colors to indicate the status of thecompartment 24, such as latched, unlatched, overloaded, available foroperation, operating, delayed, disabled, and if the movement of thecompartment 24 is obstructed. A first LED 52 a can be red in color and asecond LED 52 b can be blue in color. Alternatively, an LCD monitor typedisplay could be used. Optionally, the indicator surface 50 includes aspeaker 54 in communication with and responsive to the compartmentcontroller 30 to announce an audible status condition and/or audiblemessages regarding the compartment 24 and/or the mobile platform 10,such as “Warning: Compartment Overloaded,” “Obstruction,” “Wait forAttendant Assistance,” or “Operation Pending, Please Stand By,” forexample. The indicator surface 50 receives power from the compartmentcontroller 30, or alternatively through the pivot system 25, as will bediscussed in greater detail herein.

A fifth or volume sensor 41 is coupled with the compartment 24 whichmonitors the occupied volume within the compartment 24. Information fromthis sensor is transmitted to compartment controller 30 which thentransmits a signal to the LEDs 52 on the indicator surface 50 toindicate the bin is full. This information may only be displayed whenthe compartment 24 is closed at certain times of utilization. The volumesensor 41 can be any sensor capable of sensing a volumetric capacity,and can employ an infrared, laser or sonic device to determine a volumeof the compartment 24. The volume sensor 41 is coupled to thecompartment 24 such that it can monitor the volume of the compartment24, and is preferably recessed or mounted flush with respect to thesurface of the compartment 24.

With reference to FIGS. 1 and 2, the central controller 32 is incommunication with and responsive to the compartment controllers 30 andthe control panel 33. It should be noted that although two centralcontrollers 32 and two control panels 33 are shown, the two centralcontrollers 32 could be combined into one subassembly, as could the twocontrol panels 33. In addition, the central controllers 32 and thecontrol panels 33 could be combined into a single unit. The centralcontroller 32 relays signals from its associated compartment controllers30 to its associated control panel 33, and potentially wireless crewdevices (not specifically shown), as well as from the control panel 33to the compartment controllers 30. The control panel 33 comprises atleast one or a plurality of user input devices 56, such as buttons or atouch screen, to enable a crew member C to control the operation of thecompartments 24 (FIG. 1). In addition, the central controller 32 iscapable of notifying crew member C via the control panel 33 that certaincompartments 24 should be disabled due to performance issues such assystem faults. It will be understood that the user input devices 56 areshown as buttons for illustration purposes only, as any number of userinput devices (such as a laptop computer or an integrated attendantpanel running a software system) could be employed. In addition, if asoftware system is employed, the software system could control thecalibration of the actuator system 26 by use of the position sensor 139,as will be discussed herein. Through the control panel 33, the crewmember C can send a signal to the central controller 32, which sends thesignal to the compartment controllers 30, to unlatch and move theselected compartments 24.

In addition, the control panel 33 can include at least one or aplurality of user input devices 56 a, which correspond to a selectedarea A₁, A₂ . . . A_(n) of the cabin 14 of the mobile platform 10, asbest shown in FIG. 1. Thus, when the crew member C activates the userinput devices 56 a, a signal is sent to the central controller 32, whichsends the signal only to the compartments 24 in the selected area A₁, A₂. . . A_(n) in the cabin 14. Further, the control panel 33 can include aplurality of user input devices 56 b that correspond to each of thecompartments 24. The control panel 33 can also include at least one or aplurality of functional user input devices 56 c, such as “LATCH,”“UNLATCH,” “DISABLE,” and the like, which can be used with the userinput devices 56 a and 56 b to control specific functions for specificcompartments 24 to the central controller 32. In addition, the controlpanel 33 can also include user input devices 56 c, which are capable ofcontrolling the operation of all of the compartments 24, such as an “ALLCLOSED” OR “ALL OPEN” user input device (not specifically shown). Itshould be noted that the above control panel 33 could also comprise acomputer-based software program that allows user input in this fashion.The control panel 33 can also be an access panel for maintenancepurposes including retrieving built-in test equipment data, deactivationof specific compartments 24 if required, and retrieval of data loginformation as a history of performed operations.

With continuing reference to FIGS. 1 and 2, and with additionalreference to FIGS. 3-5, the support system 22 includes a frame 58 and aplurality of housings 60. The frame 58 is preferably a rigid, strongstructural member that forms a portion of the frame of the mobileplatform 10, and is typically arcuate. The frame 58 may be comprised ofa lightweight material, such as aluminum, a composite material, or anyother lightweight, suitably strong material. The frame 58 spans thecabin 14 of the mobile platform 10 and includes various mounting pointsor apertures 62 for coupling the housings 60, the actuator system 26 andthe latching system 28 to the frame 58 (FIG. 4). The housings 60 aregenerally rectangular and include a mating ledge 64, a shell 66 and apair of sidewalls 68. The mating ledge 64 is coupled to the shell 66 andprovides a surface for the obstruction sensor 36. The mating ledge 64 ispreferably configured to aesthetically corresponding to the cabin 14,and also serves to seal the compartment 24 against the housing 60 whenthe compartment 24 is in the closed position, as will be discussedfurther herein.

The shell 66 typically defines a cabin forward panel 70 and a rear panel72. The cabin forward panel 70 is preferably not visible to passengerswithin the cabin 14 and supports the mating ledge 64. The cabin forwardpanel 70 also provides a mounting point for a ceiling panel 71 as shownin FIGS. 5 and 6. The ceiling panel 71 substantially covers the cabinforward panel 70. The cabin forward panel 70 is coupled to or integrallyformed with the rear panel 72. The sidewalls 68 are coupled to orintegrally formed with the cabin forward panel 70 and the rear panel 72.

Each of the sidewalls 68 includes a first end 78 and a second end 80.The first end 78 of the sidewall 68 is coupled to the shell 66. Thefirst end 78 also includes a flange 89. The flange 89 is generallytriangular, with a base 93 and a shelf 95. The base 93 is generallyintegrally formed with the shelf 95 and can define apertures to couplethe flange 89 to the first end 78 via mechanical fasteners, however, anyother mechanism could be used such as adhesives and/or welding. Theshelf 95 extends generally perpendicular to the base 93 to form asurface for possible receipt of the open sensor 37, while also providinga catch for stopping the compartment 24 once the compartment 24 hasreached the full opened position. Generally, only one open sensor 37 isrequired per compartment 24. The first end 78 and the second end 80 eachinclude a mounting point or apertures 84 and a mounting flange 86. Themounting flange 86 includes a first end 88 and a second end 91. Thefirst end 88 of the mounting flange 86 is coupled to the first end 78 ofthe sidewall 68 through at least one or a plurality of mechanicalfasteners, such as screws, which are received through correspondingapertures in the first end 88 of the mounting flange 86 and into theapertures 84 in the sidewall 68. It should be understood that anysuitable fastener could be used and, in the alternative, the mountingflange 86 could be coupled to the sidewall 68 by welding and/oradhesives.

The second end 91 of the mounting flange 86 is coupled to apertures 62in the frame 58. Generally, the second end 91 of the mounting flange 86is coupled to the frame 58 via a plurality of fasteners, such as screws,linkages, brackets, bridges and/or pins; however, it will be understoodthat any suitable fastener could be used and, in the alternative, themounting flange 86 could be coupled to the frame 58 by welding and/oradhesives. The second end 80 of the sidewall 68 also includes aplurality of apertures 84 for coupling a mounting flange 86 to thesidewall 68 to further couple the housing 60 to the frame 58. As themounting flange 86 of the second end 80 is substantially similar to themounting flange 86 of the first end 78, it will not be discussed furtherherein with regard to the second end 80. The pivot system 25 is coupledto the sidewall 68, typically adjacent to the second end 80 of thesidewall 68.

The compartments 24 are rotatably coupled to the housing 60 via thepivot system 25. Each of the compartments 24 includes a cabin forwardpanel 102, a rear panel 104, a stop 105, and sidewalls 106 disposedbetween the cabin forward panel 102 and the rear panel 104. Thecompartments 24 form a structure for receiving passenger items throughan aperture 107 defined between the cabin forward panel 102 and the rearpanel 104. Each of the compartments 24 also includes an adjustableledger 108 for coupling the compartments 24 to the actuator system 26and the latching system 28. The cabin forward panel 102 and rear panel104 are generally mounted to each other and the sidewalls 106 through aplurality of mechanical fasteners, such as screws or rivets (not shown);however, any suitable technique could be used to form the compartments24, such as molding, welding and/or adhesives.

The cabin forward panel 102 includes the front surface 44 and aninterior surface 110. The front surface 44 includes a mounting point forthe switch system(s) 40, such as at least one or a plurality ofapertures (not shown). The interior surface 110 provides a surface forreceiving passenger items. The interior surface 110 is also coupled tothe sidewalls 106 such that the interior surface 110 extends a distancebeyond the sidewalls 106 for receipt of one of the obstruction sensors36. Generally, two of the obstruction sensors 36 are mounted oppositeeach other on the portion of the interior surface 110 that extendsbeyond the sidewalls 106. The rear panel 104 includes an interiorsurface 112 and the rear surface 42. The interior surface 112 alsoprovides a surface for receiving passenger items, and with the interiorsurface 110 of the cabin forward panel 102 forms an interior of thecompartment 24. An edge 114 of the rear surface 42 provides a mountingpoint, such as apertures 116, for coupling the stop 105 and theadjustable ledger 108 to the rear panel 104. The stop 105 includes ahousing 109 and a lever 111. The housing 109 includes a slot 113 forreceipt of the lever 111. The lever 111 includes a handle 115 coupled toor integrally formed with a base 117. The handle 115 extends from thehousing 109, while the base 117 of the lever 111 is sized to slidablyengage the slot 113 such that the base 117 translates within the slot113 from an extended position to a retracted position upon the movementof the handle 115. In the extended position, the base 117 can contactthe shelf 95 of the flange 89 of the housing 60 to stop the movement ofthe compartment 24 when the compartment 24 reaches the full openedposition. In the retracted position, the base 117 is retained within thehousing 109 of the stop 105 such that the compartment 24 is able torotate beyond the full opened position. When the compartment 24 rotatesbeyond the full opened position, the compartment 24 can be removed fromthe pivot system 25 of the housing 60 of the support system 22.

The sidewalls 106 are generally configured to mate with the cabinforward panel 102 and the rear panel 104. The sidewalls 106 also couplethe pivot system 25 to the compartment 24 to enable the compartment 24to pivot with respect to the housing 60. The adjustable ledger 108 iscoupled to the edge 114 of the rear panel 104 via at least one or aplurality of fasteners, such as screws or rivets. It should beunderstood, however, that the adjustable ledger 108 could be coupled tothe rear panel 104 via any suitable technique, such as molding, weldingand/or adhesives. The adjustable ledger 108 includes a first surface 122and a second surface 124. The first surface 122 is coupled to the rearpanel 104 of the compartment 24. The second surface 124 preferablyincludes rails 127 to couple the actuator system 26 and latching system28 to the compartment 24.

With reference to FIG. 4, the pivot system 25 is coupled to each of thesidewalls 68, 106 of the housing 60 and compartment 24, respectively.The pivot system 25 includes at least one conductor 131, a housing pivot133, a compartment pivot 135, a bushing 137, and a position sensor 139.The conductor 131 is in communication with and receives power from thecompartment controller 30. The conductor 131 is preferably an embeddedfoil conductor, available from 3M. The conductor 131 is coupled to thehousing 60 and enables the pivot system 25 to transfer power between thehousing 60 and the compartment 24. Preferably, one of the conductors 131of the two pivot systems 25 coupled to the housing 60 and compartment 24has a positive charge, while the other conductor 131 of the oppositepivot system 25 has a negative charge. The housing pivot 133 is disposedon the conductor 131 and is coupled to the sidewall 68 of the housing60. The housing pivot 133 is generally composed of a conductivematerial, such as a metal or metal alloy, to transfer power from theconductor 131 to the compartment pivot 135. The housing pivot 133 isgenerally annular and includes a radial space for a bushing 137, whichincludes a slot 141. Between each moving component (from the housingpivot 133 to the bushing 137 to the compartment pivot 135) at least oneconductive spring plunger 143 is used. The slot 141 is sized to slidablyengage the compartment pivot 135, and the spring plunger 143 is disposedwithin the housing pivot 133 to maintain electrical contact between thehousing pivot 133, the bushing 137 and the compartment pivot 135.

The compartment pivot 135 includes an annular base 145 with a T-shapedprotrusion 147. The annular base 145 couples the compartment pivot 135to the sidewall 106 of the compartment 24, while the T-shaped protrusion147 is sized to slidably engage the slot 141 of the pivot bushing 137 ofthe housing pivot 133. The compartment pivot 135 is generally composedof a conductive material, such as a metal or metal alloy, to enable thetransmission of power from the housing pivot 133 to the compartmentpivot 135 via the pivot bushing 137. The compartment pivot 135 is alsocoupled to various conductors 131 a to enable the transmission of dataand/or power to the obstruction sensor 36 and the switch system(s) 40.

The pivot bushing 137 enables the compartment pivot 135 to rotate withinthe housing pivot 133 to allow the compartment 24 to pivot with respectto the housing 60. The pivot bushing 137 is generally rotatably engagedto the inside of the housing pivot 133. The position sensor 139 isinstalled on the housing 60 such that the spring plunger 143 containedin the pivot busing 137 applies a pressure to the position sensor 139 tosend a signal to the compartment controller 30 regarding the degree ofrotation of the compartment 24. Only one of the two pivot systems 25 oneach compartment 24 requires this position sensor 139. The positionsensor 139 can be a radial potentiometer, but any other suitableposition sensor could be employed. Further detail regarding the pivotsystem 25 is outside the scope of the current disclosure, but isdisclosed in greater detail in pending commonly assigned U.S. patentapplication Ser. No. ______ (Attorney Docket No. 7784-000912CPA), filedconcurrently herewith, entitled “System and Method for Pivot for StowageCompartments or Rotating Items,” which is incorporated by referenceherein in its entirety.

The actuator system 26 includes an actuator 125 and a motor 126 coupledto the actuator 125. The actuator 125 is produced by M-Mac of Vancouver,British Columbia, Canada. The motor 126 is produced by Maxon Motors ofBurlingame, Calif., USA. The motor 126 coupled with the actuator 125comprise an electro-hydraulic linear actuator. As will be appreciated,the actuator system 26 provides a direct drive system for moving thecompartment 24 and does not require additional cables or rigging of thecompartment 24. The actuator system 26 is pivotably coupled to theadjustable ledger 108 of the compartment 24 via a first mounting flange128, and is pivotably coupled to the frame 58 via a second mountingflange 130. The first mounting flange 128 comprises a car which slidablyengages the rails 127 of the adjustable ledger 108. The first mountingflange 128 includes a U-shaped flange for receipt of a mechanicalfastener for pivotably coupling the actuator 125 to the first mountingflange 128. The first mounting flange 128 is secured to the adjustableledger 108 via a quick release fastener, such as a pin 129. By slidablyengaging the adjustable ledger 108, the first mounting flange 128enables the actuator system 26 to be positioned such that the actuatorsystem 26 can be coupled to the compartment 24 generally perpendicularto the rear panel 104 in cases when the attachment of the actuatorsystem 26 to the frame 58 is offset from the compartment 24 centerline,such as in tapered sections of the mobile platform 10. The secondmounting flange 130 is generally triangular, with a first end 134 forpivotably coupling the second mounting flange 130 to the actuator system26 and a second end 136 defining at least one or a plurality ofapertures 138 for receipt of mechanical fasteners, such as screws orrivets, to couple the second mounting flange 130 to the frame 58 via theapertures 62, as best shown in FIGS. 5-7. It will be understood,however, that any appropriate mechanism or technique could be employedto couple the actuator system 26 to the compartment 24 and the frame 58,such as welding and/or adhesives.

The actuator 125 includes a rod 140 and a hydraulic pump 142. The rod140 includes a first end 144 and a second end 146. The first end 144includes a bearing (not specifically shown) that defines an aperture(not specifically shown) for receipt of a mechanical fastener to couplethe rod 140 to the first mounting flange 128. Typically, the fastenerthat couples the rod 140 to the first mounting flange 128 is aquick-release fastener. The use of a quick-release fastener enables therod 140 to be disconnected from the compartment 24 without additionaldisassembly. The second end 146 of the rod 140 is affected by thehydraulic pump 142 (specific attachment not shown). The hydraulic pump142 drives the second end 146 of the rod 140 linearly upon the receiptof pressure from the hydraulic pump 142 as a result of torque from themotor 126, as is generally known in the art. It should be noted,however, that in the case of a power outage, for example, the rod 140can act as a traditional snubber to enable the compartment 24 to bemanually opened or closed, if necessary. The hydraulic pump 142 forms aclosed loop system such that the actuator 125 is not affected by changesin the pressure of the cabin 14 and is a low pressure hydraulic system.

The motor 126 is coupled to the hydraulic pump 142 and communicates withand receives power from the compartment controller 30. The compartmentcontroller 30 provides signals to the motor 126 upon the receipt of asignal to operate the compartment 24, as will be discussed in greaterdetail herein. More specifically, the compartment controller 30 signalsthe motor 126 so that the motor 126 drives the linear actuator as neededto manage the compartment 24 movement. A software system may be employedto enhance the operation of the power-assisted compartment system 12.When the motor 126 is energized, the motor 126 drives the hydraulic pump142, which in turn drives the rod 140 to extend or retract the rod 140,depending upon the rotation of the motor 126, as is generally known inthe art. The motor 126 further includes the amperage sensor 34 formonitoring an amperage, as described herein. The amperage sensor 34 isin communication with the compartment controller 30 such that thecompartment controller 30 can determine, based on the motor amperage, ifthere is an obstruction to the movement of the compartment 24. If thereis a rapid change in the sensed motor amperage, the compartmentcontroller 30 senses that an obstruction to the movement of thecompartment 24 has occurred, and the compartment controller 30 can thenreverse and/or stop the motor 126 in a predetermined fashion.

If the motor amperage exceeds a predetermined maximum during initialclosing efforts, the compartment controller 30 senses excessive load orweight in the compartment 24 and commands the actuator to reverse and/orstop the motor 126 while also sending signals to the indicator surface50 of the switch system(s) 40 and the control panel 33 to indicate anoverloaded or obstructed condition as applicable.

The latching system 28 includes a latch 154 and a latch sensor 156, andis in communication with and responsive to the compartment controller30. The latching system 28 is in either wired and/or wirelesscommunication with the compartment controller 30. The latch 154 can beformed by any suitable latch mechanism. Briefly, however, the latch 154includes a pin 158, a receiver assembly 160, a solenoid 162, and amanual release 163. The pin 158 is coupled to the adjustable ledger 108of the compartment 24 via mechanical fasteners (not specifically shown),such as screws; however, the pin 158 could be coupled to the compartment24 and/or adjustable ledger 108 via molding, welding and/or adhesives.The receiver assembly 160 is coupled to the housing 60 through amounting flange 161 via mechanical fasteners (not specifically shown);however, any suitable technique could be employed to couple the receiverassembly 160 to the housings 60 or frame 58. The receiver assembly 160is configured to secure the pin 158 to the receiver assembly 160 to holdthe compartment 24 in the closed position. The receiver assembly 160 isresponsive to the solenoid 162 via a lever (not shown). The lever ispivoted by the solenoid 162 to release the pin 158 from the receiverassembly 160, as will be discussed herein.

The solenoid 162 is in communication with and responsive to thecompartment controller 30 to receive power from the compartmentcontroller 30. When the solenoid 162 receives power from the compartmentcontroller 30, the pin 158 is released. When the pin 158 re-engages thereceiver assembly 160, the pin 158 is recaptured and secured. Anexemplary latch is disclosed in greater detail in U.S. Pat. No.4,597,599, assigned to and commercially available from Southco., Inc. ofConcordville, Pa., and incorporated by reference herein in its entirety.The solenoid 162 is also coupled to the manual release 163. The manualrelease 163 includes a push-button 165 and a cable 167. The push-button165 can be accessible by a crewmember C in the cabin 14 to enable therelease of the compartment 24 in cases of a power outage or systemfailure, for example. The push button 165 is coupled to the cable 167.The cable 167 is in turn coupled to the receiver assembly 160. In thecase where manual release of the compartment 24 is necessary, thedepression of the push-button 165 causes the cable 167 to release thepin 158.

Based on the position of the pin 158, the compartment controller 30 alsodetermines whether the latching system 28 is latched or unlatched. Thelatch sensor 156 is comprised of multiple micro-sensors (not shown) toverify that the pin 158 has securely entered the latch engagement device(not shown) of the receiver assembly 160. In addition, the latch sensor156 is in wired and/or wireless communication with the compartmentcontroller 30 to send a signal if the pin 158 is not fully engaged andsecured in the receiver assembly 160.

In order to operate one of the compartments 24, when the compartment 24is in the closed and latched position, an operator in the cabin 14depresses the switch system(s) 40 or applicable control panel 33 button,as shown in FIGS. 1 and 4. This sends a signal to the compartmentcontroller 30 that a request to open the compartment 24 has been made.The compartment controller 30 then supplies power to the solenoid 162,which causes the pushrod 166 of the solenoid 162 to release the pin 158.Once the compartment 24 is unlatched, the compartment controller 30provides power to the motor 126 of the actuator system 26. The torquefrom the motor 126 then drives the hydraulic pump 142, which drives theactuator 125 to extend the rod 140 and, thus, lower the compartment 24into the full opened position (FIG. 7). When the compartment 24 reachesthe full opened position, the open sensor 37 sends a signal to thecompartment controller 30 to indicate that the compartment 24 hasreached the full opened position. When the compartment 24 is in theopened position, the operator may then place his/her items into thecompartment 24.

When the compartment 24 is in an opened position, the compartment 24 iscommanded to close by pressing the appropriate switch system(s) 40. Thissends a signal to the compartment controller 30 that a request to raisethe compartment 24 has been made. Alternatively, the compartment 24 canbe commanded to close by the user pressing up on the compartment 24. Bypressing up on the compartment 24 when in the full open position, theopen sensor 37 sends a signal to the compartment controller 30 that thecompartment 24 is no longer in the full opened position. Based on thesignal from the open sensor 37, the compartment controller 30 signalsthe actuator system 26 to raise the compartment 24. If the compartment24 is not fully open or closed, pressing up or pulling down on thecompartment 24 would transmit a signal via the one or a combination ofmany sensors, such as the amperage sensor 34 or position sensor 139, tosignal the compartment controller 30 to send a signal to the actuatorsystem 26 to raise or lower the compartment 24, respectively.

In any event, when the compartment controller 30 determines that thecompartment 24 should be raised, the compartment controller 30 suppliespower to the motor 126 of the actuator system 26 (FIG. 2). The torquefrom the motor 126 drives the hydraulic pump 142, which drives theactuator 125 to retract the rod 140 and thus raise the compartment 24.If the load of the items contained in a single compartment 24 exceed apredetermined threshold as determined by the amperage sensor 34, then asignal is sent to the compartment controller 30 to reverse and/or stopthe motor 126 and indicate that the allowable weight of the compartment24 has been exceeded. The compartment controller 30 then sends a signalto the speaker 54 of the indicator surface 50 to announce that theweight has been exceeded, and a signal to the LEDs 52 on the indicatorsurface 50 to illuminate to signal a compartment overloaded condition(FIG. 4). In addition, a notification will be provided to the controlpanel 33 for annunciation.

Once the passenger has loaded his/her personal items, the operatordepresses the switch system(s) 40 (FIGS. 1 and 4). This sends a signalto the compartment controller 30 that a request to raise the compartment24 has been made. The compartment controller 30 then supplies power tothe motor 126 of the actuator system 26 (FIG. 2). The torque from themotor 126 drives the hydraulic pump 142, which drives the actuator 125to retract the rod 140 and thus raise the compartment 24. As thecompartment 24 is moved into the closed position, the pin 158 of thelatching system 28 enters into the receiver assembly 160 (FIG. 5). Thepin 158 moves into the receiver assembly 160 until the latch sensor 156detects a closed position, then the compartment controller 30discontinues the supply of power to the motor 126 of the actuator system26. If, however, the pin 158 is not fully secured in the receiverassembly 160, then the latch sensor 156 will send a signal to thecompartment controller 30 that the compartment 24 is not properlylatched. Based on this signal from the latch sensor 156, the compartmentcontroller 30 will then send a signal to the speaker 54 of the indicatorsurface 50 to announce that the compartment 24 is not properly latched,and send a signal to the LEDs 52 on the indicator surface 50 toilluminate to signal an incorrectly latched compartment condition (FIGS.2 and 4). In addition, a notification will be provided to the controlpanel 33 for annunciation.

If, during travel of the compartment 24, the compartment 24 encounters asudden change in loading (primary obstruction detection) as determinedby the amperage sensor 34, a signal is sent to the compartmentcontroller 30 to reverse and or stop the direction of the motor 126. Thecompartment controller 30 then reverses or stops the motor 126 byaltering or discontinuing the supply of power to the motor 126. Based onthe signal from the amperage sensor 34, the compartment controller 30will then send a signal to the speaker 54 of the indicator surface 50 toannounce that the compartment 24 has encountered an obstruction, and asignal to the LEDs 52 on the indicator surface 50 to illuminatesignaling an obstructed condition of the compartment 24 (FIGS. 2 and 4).In addition, a notification will be provided to the control panel 33 foran appropriate annunciation. If, during travel of the compartment 24,the compartment 24 encounters an object as determined by one of theobstruction sensors 36, the obstruction sensor 36 will send a signal tothe compartment controller 30. The compartment controller 30 thenbriefly reverses the direction of the motor 126 and then discontinuesthe supply of power to the motor 126 to stop the movement of thecompartment 24. The compartment controller 30 also sends a signal to thespeaker 54 of the indicator surface 50 to announce that there is anobstruction, and sends a signal to the LEDs 52 on the indicator surface50 to illuminate to signal an obstructed condition. Upon clearing theobstruction, the user may depress either one of the OPEN or CLOSEbuttons 46, 48 to operate the compartment 24 in the desired direction.

In addition, if a crew member desires to control the operation orprevent the operation of a certain compartment or compartments 24, thecrew member, through the appropriate control panel 33, can manage use ofany and all applicable compartment(s). In the alternative, a softwareprogram could be used to manage operation of selected compartments 24.When the associated area user input device 56 a, specific compartmentuser input device 56 b and functional user input device 56 c aredepressed, signals are sent from the control panel 33 to the centralcontroller 32. The central controller 32 then routes the commands orsignals to the affected compartment controllers 30. The compartmentcontrollers 30 then perform the requested operation and provideannunciation on the applicable LEDs 52 on the indicator surface 50 aswell as annunciation on the control panel 33.

Thus, the present disclosure provides the power-assisted compartmentsystem 12 with no visible mechanisms to the cabin 14 to raise and lowerthe compartments 24. Specifically, as the actuator system 26 is coupledto the rear wall of the compartment 24, the actuator system 26 cannot bedamaged by the loading and unloading of personal items stored in thecompartment 24. Further, the present disclosure requires a singleattachment to the support structure instead of the two attachmentstypically required, such as the two latches and snubbers traditionallyemployed to operate the compartments 24.

Referring now to FIG. 9 (System Control Module), the control system 20includes a control module 200. As used herein, the term module refers toan application specific integrated circuit (ASIC), an electroniccircuit, a processor (shared, dedicated, or group) and memory thatexecutes one or more software or firmware programs, a combinationallogic circuit, and/or other suitable components that provide thedescribed functionality. In FIG. 9: System Control Module, a dataflowdiagram illustrates various components of a compartment control systemthat can be embedded within a control module 200. Various embodiments ofcompartment control systems according to the present disclosure mayinclude any number of sub-modules embedded within the control module200. The sub-modules shown may be combined and/or further partitioned tosimilarly monitor the compartment(s) 24. Inputs to the system may bereceived from the amperage sensors 34, obstruction sensors 36, opensensors 37, position sensors 139, switch system 40, volume sensors 41,latch sensor 156, or other sensors (not shown), or even received fromother control modules (not shown) within the mobile platform 10, and/ordetermined by other sub-modules (not shown) within the control module200 (not shown). In various embodiments, the control module 200 of FIG.9: System Control Module includes a start-up module 202, a compartmentcontrol module 204, a shutdown module 206, and a graphical userinterface (GUI) manager module 208.

The start-up module 202 receives as input a start-up signal 210. Thestart-up signal 210 indicates an initiation of the control system 20.The start-up module 202 performs a start-up procedure upon receipt ofthe start-up signal 210 and outputs failure data 212 or sets a start-upcommand 214 accordingly. The compartment control module 204 receives asinput the start-up command 214, volume data 216, warning active data218, open data 220, close data 222, position data 224, obstruction data226, weight data 228, and a shutdown command 230.

The compartment control module 204 also receives GUI data 232 as input.Based on these inputs, the compartment control module 204 determines aproper function for the compartment(s) 24, and sets control signal 234,indicator data 236 and compartment status data 238. The compartmentcontrol module 204 also sets compartment status data 240, indicator data242, and fault data 244 for the graphical user interface (GUI) managermodule 208.

The shutdown module 206 receives as input a shutdown signal 245 andcompartment status data 240. The shutdown signal 245 indicates atermination of the system. The shutdown module 206 performs a shutdownprocedure upon receipt of the shutdown signal 245 and outputs data 247or sets the shutdown command 230 accordingly. The GUI manager module 208receives as input the failure data 212, compartment status data 240,indicator data 242, fault data 244 and user input data 246. Based onthese inputs, the GUI manager module 208 generates GUI information 248for a GUI based control panel 249. The GUI manager module 208, the GUIcontrol panel 249, the user input data 246 and the GUI information 248can collectively be viewed as forming a graphical user interfacesubsystem of the module 200.

With additional reference to FIG. 10 (Compartment InitializationProcedure), a process flow diagram illustrates a start-up sequenceperformed by the start-up module 202. In operation 250, communication isenabled with the compartment controller 30. In operation 252, controltests the control module 200.

With reference now to FIG. 11 (Control Module 200 Test Procedure), aprocess flow diagram illustrates a method performed to test the controlmodule 200. In operation 253, control makes sure the warning sign, suchas the “Fasten Seatbelts” sign, is off. Then, in operation 254, controlfirst makes sure the compartment 24 is fully closed. In operation 256,control tests the logic associated with the OPEN button 46 on the switchsystem 40. If, in operation 258, the compartment 24 unlatches and beginsmoving into the opening direction, and stops in the fully openedposition, then in operation 262, control tests the logic associated withthe CLOSE button 48 of the switch system 40. Otherwise, in operation260, the error is logged and the control module 200 test is complete.

In operation 264, after the CLOSE button 48 test has been initiated, thecompartment 24 should move into the closed position and latch. If thecompartment 24 does not close and latch, in operation 266, then error islogged. Otherwise, in operation 268, control initiates the logicassociated with a signal from the CLOSE button 48 of the switch system40. The compartment 24 should unlatch and begin moving into the fullyopen position until the fully opened position is reached. In operation270, if the compartment 24 has successfully opened, then, in operation274, control initiates the logic associated with the OPEN button 46 ofthe switch system 40. Otherwise, in operation 272, the error is loggedand the control module 200 test is complete.

With the OPEN button 46 logic test initiated, while the compartment 24is in the fully opened position, the compartment 24 should begin movinginto the closed position. If, in operation 276, the compartment 24reaches the closed position successfully, then with reference now toFIG. 12 (Control Module 200 Test Procedure), in operation 280, with thecompartment in the fully closed position, control tests the logicassociated with an operator depressing the switch system 40 such thatthe compartment 24 moves into the opened position. Otherwise, withreference back to FIG. 11 (Control Module 200 Test Procedure), inoperation 278, the error is logged and the control module 200 test iscomplete.

With reference to FIG. 12 (Control Module 200 Test Procedure), if thecompartment 24 is opening in operation 282, then the control initiatesthe logic associated with the OPEN button 46 in operation 286 to pausethe motion of the compartment 24. If the compartment 24 is not openingthen in operation 283 the error is logged and the control module 200test is complete. The motor 126 should stop and the compartment 24should continue to open under gravity. Otherwise, the error is logged inoperation 284 and the control module 200 test is complete.

If the motion of the compartment 24 has stopped, then in operation 292,the compartment 24 should be fully opened under gravity. If thecompartment 24 is not fully opened under gravity, then in operation 294,control loops until the compartment 24 is fully opened. With thecompartment 24 fully opened, in operation 296, control initiates thelogic associated with the compartment 24 being lifted off of the fullopen sensor 37. The compartment 24 should begin moving into the closedposition. In operation 298, if the compartment 24 closes successfully,then with reference now to FIG. 13 (Control Module 200 Test Procedure),control initiates the opening of the compartment 24 by the depressingeither the OPEN button 46 or the CLOSE button 48 of the switch system 40in operation 302. Otherwise, in operation 300 the error is logged andthe control module 200 test is complete (FIG. 12).

With continuing reference to FIG. 13 (Control Module 200 TestProcedure), in operation 304, if the compartment 24 is opening, then inoperation 308 control initiates the depression of the CLOSE button 48.Then, the motor 126 should stop and the compartment 24 should continueto open under gravity. If, in operation 310, the motor 126 did not stop,then in operation 312, the error is logged and the control module 200test is complete.

In operation 314, if the compartment 24 is fully opened under the powerof gravity, then in operation 318, control initiates the logicassociated with the depression of the CLOSE button. Otherwise, controlloops in operation 316 until the compartment 24 is fully opened. Afterthe CLOSE button 48 logic is initiated, then in operation 320, if thecompartment 24 is closing, then, in operation 324, control initiates thelogic associated with the OPEN button 46 being depressed as shown inFIG. 14 (Control Module 200 Test Procedure). Otherwise, if thecompartment 24 is not closing, then, in operation 322 the error islogged and the control module 200 test is complete.

When the OPEN button 46 logic initiated, the motor 126 and thecompartment 24 should stop, and return to the fully opened positionunder gravity. In operation 326, if the compartment 24 motion hasstopped, and, in operation 330, if the compartment 24 is fully opened,then in operation 334, control initiates the logic associated witheither the OPEN button 46 or CLOSE button 48 being depressed. Otherwise,in operation 328, the error is logged and the control module 200 test iscomplete.

In operation 336, if the compartment 24 is closing, then in operation340, control initiates the CLOSE button 48 logic. Otherwise, inoperation 338, the error is logged and the control module 200 test iscomplete. If in operation 342 the motor 126 stops, and then controlloops in operation 346 the compartment 24 opens under the power ofgravity. With reference to FIG. 15: Control Module 200 Test Procedure),once the compartment 24 is fully opened, in operation 350 controlinitiates the logic associated with the depression of the CLOSE button48.

In operation 352, if the compartment 24 is closing, then in operation356 control initiates the logic associated with either the OPEN button46 or CLOSE button 48 being depressed. Otherwise, in operation 354 theerror is logged and the control module 200 test is complete. With thelogic associated with the OPEN or CLOSE buttons 46, 48 depressedinitiated in operation 358, the motor 126 should stop and thecompartment 24 should continue to open under gravity. If the motor 126does not stop, then the error is logged in operation 360 and the controlmodule 200 test is complete. If the motor 126 stops in operation 358,then in operation 362 control initiates the logic associated with theCLOSE button 48 being depressed.

If in operation 364, the compartment 24 has reached the fully closedposition, then in operation 368, control initiates the logic associatedwith the OPEN button 46 or CLOSE button 48 being depressed. Otherwise,in operation 366 the error is logged and the control module 200 test iscomplete. If in operation 370, the compartment 24 is opening, then withreference now to FIG. 16 (Control Module 200 Test Procedure), inoperation 374 control initiates the logic associated with OPEN button 46or CLOSE button 48 being depressed. If the compartment 24 is notopening, in operation 370, then the error is logged and the controlmodule 200 test is complete. If in operation 376 motor 126 has stoppedthen, in operation 380, control initiates the logic associated with thedepression of the OPEN button 46. Otherwise, the error is logged inoperation 378 and the control module 200 test is complete.

If in operation 382, the compartment 24 has completed opening into thefully opened position, then in operation 386 the CLOSE button 48 logicis initiated. Otherwise, the error is logged in operation 384 and thecontrol module 200 is complete. If in operation 388 the compartment 24is closing, then in operation 392 the control initiates the logicassociated with the depression of either the OPEN button 46 or CLOSEbutton 48. Then in operation 394, with reference to FIG. 17 (ControlModule 200 Test Procedure) if the compartment 24 has stopped moving,then in operation 398 control initiates the OPEN button 46 logic. If inoperation 400 the compartment 24 completes opening into the fully openedposition, then in operation 404 control initiates the logic associatedwith the depression of either the OPEN or CLOSE buttons 46, 48.Otherwise, the error is logged in operation 402 and the control module200 is complete.

In operation 406, if the compartment 24 is opening, then in operation410 control initiates the logic associated with the depression of eitherthe OPEN or CLOSE buttons 46, 48 to pause the motion of the compartment24. If the compartment 24 is not opening, then the error is logged andthe control module 200 test is complete in operation 408.

In operation 412, if the motor 126 has stopped, then in operation 416the CLOSE button 48 logic is initiated. If the motor 126 does not stop,then the error is logged and the control module 200 test is complete. Inoperation 418, if the compartment 24 has completed closing, then withreference to FIG. 18 (Control Module 200 Test Procedure), controlinitiates the logic associated with the depression of either the OPEN orCLOSE buttons 46, 48 in operation 422. Otherwise, in operation 420 theerror is logged and the control module 200 test is complete.

If in operation 424 the compartment 24 is opening, then in operation 428control initiates the obstruction sensor 36 logic. If in operation 430the motor 126 reverses its direction of motion and then stops, thencontrol goes to operation 434. Otherwise, the error is logged and thecontrol module 200 test is complete in operation 426. In operation 434,if the compartment 24 has reached the fully open position under gravity,then with reference to FIG. 19 (Control Module 200 Test Procedure),control initiates the logic associated with the depression of the switchsystem 40 in operation 438.

If, in operation 440, the compartment 24 is closing, then, in operation444, control initiates the logic of a second force being applied to theobstruction sensor 36. Otherwise, the error is logged and the controlmodule 200 test is complete in operation 442. If, in operation 446, themotor 126 reverses direction and then stops, then control goes tooperation 450. Otherwise, the error is logged and the control module 200test is complete in operation 448. In operation 450, if the compartment24 has reached the fully opened position, then, the warning sign logicis initiated. In operation 452, control determines if the warning signis off. If the warning sign is off, then in operation 453, control turnsthe warning sign on and loops to Q. If the warning sign is on, then inoperation 454, control determines if the grace period has expired, andloops to operation 454 until the grace period expires. Once the graceperiod of the warning sign has expired, in operation 456, controlinitiates the logic associated with the depression of the switch system40, and the compartment 24 should move into the closed position. If inoperation 458 the compartment 24 does not reach the fully closedposition, then in operation 460 the error is logged and the controlmodule 200 test is complete.

Once the compartment 24 is closed, with reference to FIG. 20 (ControlModule 200 Test Procedure), in operation 462, control initiates thelogic associated with an operator depressing the OPEN or CLOSE buttons46, 48 an incorrect number of times for the crew code. If, in operation464, the compartment 24 opens, then in operation 466 the error is loggedand the control module 200 test is complete. Otherwise, in operation468, control tests the logic associated with an incorrect crew code. If,in operation 470, the compartment 24 is opening, then, in operation 472,the error is logged and the control module 200 test is complete.Otherwise, in operation 474, control tests the logic of a correct crewcode being entered, and if, in operation 476, the compartment 24 opens,then, in operation 480, the control module 200 test is complete.Otherwise, the error is logged in operation 478 and the control module200 test is complete.

With reference back to FIG. 10: Compartment Initialization Procedure),in operation 482, the hardware is tested. With reference now to FIG. 21,a process flow diagram illustrates a method performed to test thehardware. In order to test the hardware, an operator depresses theobstruction sensor 36 in operation 484. If the obstruction sensor 36input is sensed in operation 486, then the operator depresses theobstruction sensor 36 coupled to the sidewall 68 of the compartment 24in operation 488. Otherwise, the error is logged in operation 490. Ifthe side obstruction sensor 36 input is sensed in operation 492, thenthe compartment 24 is instructed to close in operation 494. Otherwise,the error is logged in operation 496. If in operation 497, the latchsensor 156 sends a signal that the compartment 24 is latched and closed,then in operation 498, the compartment 24 is commanded to open.Otherwise, the error is logged in operation 500. In operation 502, ifthe open sensor 37 does not signal that the compartment 24 is fullyopened, the error is logged.

Next, with reference to FIG. 22, if the open sensor 37 does signal thatthe compartment 24 is fully opened, then the compartment 24 is commandedto close in operation 504. In operation 506, if the amperage sensor 34provides the proper position signals, then in operation 508, thehardware check is complete. Otherwise, in operation 510 the error islogged.

With reference back to FIG. 10 (Compartment Initialization Procedure),if any errors were logged during operation 252 and operation 482, thenin operation 512 the failure data 212 is transmitted to the GUI managermodule 208, as will be discussed in greater detail herein (FIG. 9:System Control Module). If there are no errors logged, then in operation514, the initial compartment 24 position is received from the amperagesensor 34. Then, in operation 516, the Kalman filter is initialized todetermine the estimated position or measured position and speed of thecompartment 24, and the steady state Kalman filter gain matrix iscomputed.

The speed of the compartment 24 is computed from the position data fromthe amperage sensor 34 by using a steady state, linear, discrete Kalmanfilter. In order to achieve these estimates, first, the measuredposition of the actuator system 24 is taken to be X. Then, the previousposition estimate is set as Xold and the previous speed estimate is setas Sold. The new estimates for position and speed of the compartment 24are:

X _(new) =X _(old) +K ₁(X−X _(old))+T(S _(old) +K ₂(X−X _(old)))  (1)

S _(new) =S _(old) +K ₂(X−X _(old))  (2)

where K₁ is the first element of the steady state Kalman gain matrix andK₂ is the second element. Next, X_(old) is replaced by X_(new) andS_(old) is replaced by S_(new). Then, the steady state Kalman gainmatrix is computed upon initialization of the actuator system 24. Thecomputation of the Kalman gain matrix is an iterative process. Thefollowing operations are performed:

(1) Initialize 2×2 state estimate covariance matrix P⁺

(2) Initialize 2×2 process noise covariance matrix Q

(3) Initialize 1×1 measurement noise covariance matrix R.

(4) Set 2×1 saved Kalman gain matrix K to zero.

(5) Establish state transition matrix Φ, where T is a measurementsampling rate:

$\begin{matrix}{\Phi = {\begin{matrix}1 & T \\0 & 1\end{matrix}}} & (3)\end{matrix}$

(6) Establish measurement matrix H:

H=|1 0|  (4)

(7) Compute new Kalman gain matrix:

K=P ⁺ H ^(T)(HP ⁺ H ^(T) +R)⁻¹  (5)

(8) Determine if K is converged (with an epsilon of previous K)? If K isconverged, then the computation is complete with K₁ as the first elementof K and K₂ as the second element of K. Otherwise, the computed K issaved, and the process continues to operation (9).

(9) Update P matrix:

P ⁻=(I−KH)P ⁺  (6)

(10) Propagate P Matrix:

P ⁺ =ΦP ⁻Φ^(T) +Q  (7)

(11) Go to Operation (7).

After the Kalman filter computed speed is determined, with continuingreference to FIG. 10 (Compartment Initialization Procedure), inoperation 518 a warning sign is turned off or deactivated. The warningsign can be a “No Smoking” sign, a “Fasten Seatbelts” sign, or any otherappropriate warning indicator. Then, in operation 520, the type ofcompartment 24 is determined, such as crew, emergency or passenger. Inoperation 522, the start-up command 214 is transmitted to thecompartment control module 204.

With reference now to FIG. 23 (Control Module, a dataflow diagramillustrates various embodiments of a compartment control system that canbe embedded within the compartment control module 204. In variousembodiments, the compartment control module 204 includes a compartmentmonitor module 524, a control module 526, and an indicator module 528.

The compartment monitor module 524 receives as input the GUI data 232,start-up command 214, volume data 216, warning active data 218, opendata 220, close data 222, position data 224, obstruction data 226,weight data 228, and the shutdown command 230. Based on these inputs,the compartment monitor module 524 determines a proper status for thecompartment(s) 24, and sets compartment status data 238. The compartmentmonitor module 524 also sets the fault data 244 for the graphical userinterface (GUI) module 208. The control module 526 receives as input thecompartment status data 238, and based on the compartment status data238, the control module 526 outputs the control signal 234. Theindicator module 528 receives as input the compartment status data 238,and based on the compartment status data 238, the indicator module 528outputs the indicator data 236.

With reference to FIG. 24 (Compartment Status Procedure), a process flowdiagram illustrates a compartment status monitoring method 530 performedby the compartment monitor module 524. In operation 532, the obstructionstatus is checked. With reference now to FIG. 25 (Obstruction MonitoringProcedure), a process flow diagram 534 illustrates a method for checkingfor an obstruction. In operation 536, if the control current is lessthan a maximum, then in operation 538 the change in the control currentis compared to the maximum. The determination of the control currentwill be discussed in greater detail herein. If the change in the controlcurrent is greater than the maximum, then in operation 540 controlchecks if a signal has been received from the obstruction sensor 36.

If no signal has been received from the obstruction sensor 36, then inoperation 542 the compartment 24 is held to not be obstructed.Otherwise, if one of operation 536, 538 and 540 are true, then inoperation 544 the compartment controller 30 applies a reverse current tothe motor 126 such that the compartment 24 reverses its direction ofmotion. Then in operation 546 the compartment reversing status is set totrue, and in operation 548 the compartment obstructed status is set totrue. In output 550, the compartment status data 238 is output.

With reference back to FIG. 24 (Compartment Status Procedure), inoperation 552 control checks to see if the warning sign is active. Withreference to FIG. 26 (Fasten Seatbelt (FSB) Procedure), a process flowdiagram 554 illustrates the warning sign monitoring method performed bythe compartment monitor module 524. In operation 556 control checks if asignal has been received that the warning, such as the “No Smoking” signor the “Fasten Seatbelts” sign has been activated. If the warning hasbeen activated, then in operation 558 control determines if a warninglight is on. If the warning light is on, then in operation 560 controlturns the warning light off stops a warning light timer, and sets atimed-out status to false. Otherwise, if the warning light is not on,then in operation 562 control turns the warning light on and starts thewarning light timer. At the end of operation 560 and 562 the compartmentstatus data 238 is set to indicate that the warning timer is on.

If, however, the warning is not active, then in operation 564 controldetermines whether the warning light is on. If the warning light is noton, then control sets compartment status data 238 in operation 566 toreflect that the warning is not active. Otherwise, if the warning lightis on, then in operation 568 control determines if the warning lighttimer has expired. If the warning light timer has expired, then inoperation 570 control sets the warning timed-out status to true.Otherwise, control updates the compartment status data 238 to indicatethat the warning timer is active.

With reference back to FIG. 24 (Compartment Status Procedure), operation572 control determines the weight of the compartment 24 for the purposeof monitoring the amount of luggage or items in the compartment at anygiven time. The weight of the compartment 24 is computed using thedeviation in actual operating speed from the expected operating speed ofthe compartment 24. First, the applied torque is computed, wherein theapplied torque in Newton-meters (N-m) is:

T=K _(T)(Control current−I _(NL))/1000  (8)

where K_(T) is a torque constant (N−m/A) and I_(NL) is the motor no-loadcurrent (mA). The determination of the control current will be discussedin greater detail below. After the applied torque is determined, thecompartment open angle (θ) is computed based on the estimatedcompartment position. Then, the estimated weight of the compartment 24is computed, wherein the weight in kilograms (kg) is:

W=2T/(L sin θ)  (9)

where L is the effective moment arm of the compartment 24 in meters (m).In our sample case, L is not perfectly a constant. The location of thecenter of gravity relative to the pivot system 25 varies as thecompartment 24 moves through its range of motion. Also, since thecompartment 24 rotates, the factor that the force of gravity places onthe compartment 24 varies. These factors have been ignored in ourcalculation as the variances these factors would cause were determinedto be negligible. This may not always be the case. If the estimatedweight W is greater than the pre-designated compartment maximum load,then the compartment 24 is declared to be overweight, and with referenceto FIG. 24: Compartment Status Procedure), the compartment status isoutputted as overweight.

With reference to FIG. 27 (Speed (Current) Control Procedure), a processflow diagram 574 illustrates how to calculate the control current forthe compartment 24. In operation 526, if the compartment 24 is notopening or closing and is obstructed, then the control current is set tozero in operation 578. Otherwise, if the compartment 24 is opening orclosing and not obstructed, then in operation 580 control determines ifthe current is set under automatic control. When operating underautomatic control, the control current is computed based on speed error,based on a profile provided through the GUI data 232, as will bediscussed in greater detail herein.

Based on the GUI data 232, a real-time correction is applied to theselected profile to ensure that the perceived profile is close to theselected profile. The real-time correction is applied through thefollowing operations:

(1) Receive demand velocity D, which can be a constant or a profile.There are two possible modes for setting the demand speed used in thecompartment control system—constant speed and variable speed. Theconstant speed mode ramps up to a constant input speed value that isused for the entire opening process and closing process. This demandspeed can be different for opening and closing of the compartment 24 ifdesired. The ramp up time is an input value, which will be discussed indetail herein. The variable speed mode computes a demand speed profilefor the compartment controller 30 to follow once an OPEN button 46 orCLOSE button 48 is pressed. This profile shape is based on severalparameters such as a measured location of the compartment 24, a desireddirection of motion, a desired current draw, and a desired time to reachthe fully opened or fully closed position, as will be discussed indetail herein.

(2) Compute speed error E:

E=D−S _(new)  (10)

If, however, the compartment 24 is opening or closing, is not obstructedand is under automatic control, in operation 588 the control current isset to an automatic control current.

where S_(new) is the speed estimate from the Kalman filter describedherein.

(3) Compute control current:

$\begin{matrix}{{{Control}\mspace{14mu} {current}} = {{{- K_{P}}E} - {K_{I}{\sum\limits_{i = 1}^{n}{E_{i}T}}}}} & (11)\end{matrix}$

where K_(P) is the proportional gain, K_(I) is the integral gain, and Tis the sampling interval. The second term computed in equation (11) isthe summed integral errors since the motor 126 was activated to beginmotion. If the current is not under automatic control, then in operation582 control determines whether the compartment 24 is opening. If thecompartment 24 is opening, then the control current is set to a maximuminput value in operation 584. Otherwise, if the compartment 24 is notunder automatic control and is not opening, then the control current isset to a negative maximum input value, in operation 586. The automaticmode, with its ability to ramp up to and down from the maximum speed,creates less wear and tear on mechanical components of thepower-assisted compartment system 12.

Referring back to FIG. 24 (Compartment Status Procedure), after theweight of the compartment 24 is determined, then in operation 588,control determines if the compartment 24 is disabled. Then, in operation591, control determines if the compartment 24 is full. In order todetermine if the compartment 24 is full, with reference to FIG. 26A(Volume Sensing Procedure), the occupied volume of the compartment 24 isdetermined in operation 593. The occupied volume of the compartment 24can be determined through a variety of techniques, such as based on aninput from the volume sensor 41. In operation 595, the available volumein the compartment 24 is computed. In operation 597, the availablevolume is output as compartment status data 238.

With reference back to FIG. 24 (Compartment Status Procedure), inoperation 592, a check is made if the OPEN button 46 has been pushed. Ifthe OPEN button 46 has been pushed, then in operation 594, an OPENbutton operational sequence 596. Otherwise, in operation 598, a check ismade if the CLOSE button 48 has been pushed. If the CLOSE button 48 hasnot been pushed, then a check is made in operation 599 if a manual inputhas been applied to the compartment 24. If no manual input has beenapplied, then a loop is made to operation 532. Otherwise, in operation600, a CLOSE button operational sequence 602 is initiated, and inoperation 601 a manual input operational sequence 603 is initiated, aswill be discussed herein.

With reference to FIG. 28 (“OPEN” Button Activation Procedure), aprocess flow diagram illustrates the OPEN button operational sequence596 for the compartment 24. If the OPEN button 46 has been pushed, thenin operation 604, a power management routine 606 is performed. Withreference to FIG. 29 (Power Management Procedure), a process flowdiagram illustrates the power management routine 606. In operation 608,if the OPEN or CLOSE button 46 or 48 is pushed, then in operation 610control decides if the compartment 24 is allowed to move. If thecompartment 24 is not allowed to move, then control loops to operation623. Otherwise, if the compartment 24 is allowed to move, then inoperation 612 control logs that a command to move the compartment 24 hasbeen made along with the compartment identification number and thecompartment tier type. The compartment tier type refers to the hierarchyof the compartments 24. For instance, emergency equipment compartments24 may have a higher priority than crew or passenger compartments 24,and in addition, first class compartments 24 may have a higher prioritythan economy class compartments, however, any priority scheme ispossible.

In operation 614, the move requests are sorted by the tier ofcompartment 24. Then, in operation 616 a specific compartment 24 isassigned to move. In operation 618, the existent power draw of thepower-assisted compartment system 12 is calculated, and then inoperation 620 the existent power availability is calculated. Theexistent power availability calculation will take into account variouselements such as, but not limited to, how much power is being suppliedto the mobile platform 10, how much of this power is available for thecompartment 24 operation, and how much power the compartment 24operation is already using. In operation 622, control determines ifpower is available. If power is available, then in operation 623 thepower mitigation strategy is checked. This strategy dictates the methodin which the control system 20 determines in what manner to best supplythe power. These scenarios may be determined by the user. For example,in some cases where all of the compartments 24 are to be opened at once,the amount of time to required for the compartments 24 to completelyopen may not be an important factor. In this case the control system 20would sacrifice the usual short opening period of several seconds andwould allow all the compartments 24 to be moving at once but at a slowerrate and thus supply a lower current to the moving compartment(s) 24.Once the mitigation strategy has been determined the system willcalculate the available current to supply to the compartment 24 inoperation 625. Then in operation 624, the compartment 24 assigned tomove is removed from the log and then in operation 626 the log isresorted by the compartment tier level. In operation 628 the compartment24 assigned to move is allowed to move, and in operation 630 controlloops to either the OPEN button operational sequence 596 or the CLOSEbutton operational sequence 602.

However, if power is not available in operation 622, then compartmentstatus data 238 is sent to the indicator module 528 to change theindicator surface 50 to indicate a delay. For example, the indicatorsurface 50 could be instructed to enable the first LED (52 a) to flash.After the compartment status data 238 has been relayed in operation 632,control loops to operation 620 until the compartment 24 is assignedmove.

Now, with reference back to FIG. 28 (“OPEN” Button ActivationProcedure), if the compartment 24 is disabled or overweight, then inoperation 634 the compartment status data 238 is transmitted to theindicator module 528. Otherwise, if the compartment 24 is not disabledor overweight, then in operation 636, control determines if thecompartment 24 is fully closed. If the compartment 24 is not fullyclosed, then in operation 638 control determines if the compartment 24is fully opened. If the compartment 24 is fully opened, then thecompartment status data 238 is set to move compartment 24 into theclosed position in operation 640. If the compartment 24 is not in thefully opened position, then in operation 642, control determines if thecompartment 24 is in a paused position. If the compartment 24 is in apaused position, then the compartment status data 238 is set to movecompartment 24 into the opened position in operation 644. If thecompartment 24 is not in the paused position, then the compartmentstatus data 238 is set to stop the movement of the compartment 24 inoperation 646.

If the compartment 24 is fully closed in operation 636, then inoperation 646, control determines if the compartment 24 is a crewcompartment or a passenger compartment with the warning active and thewarning timer expired. If the compartment 24 is a crew or passengercompartment 24 with the warning active and timer expired, then inoperation 650, control determines if a correct crew code has beeninputted. The correct crew code can be a series of predefined inputs tothe switch system 40 that enable the compartment 24 to operate evenafter the warning timer has expired. If the latest input to the switchsystem 40 completes a correct number of crew code inputs in operation650, then in operation 649 control checks to see if the correct crewcode series has been input. If the correct crew code series input hasbeen entered then, in operation 652, the compartment status data 238 isset to open the compartment 24. If, however, the latest input to theswitch system 40 does not complete a correct number of crew code inputs,then an additional button push is added to the crew code, in operation654. If the correct number of crew code inputs has been recorded inoperation 650 but, in operation 650 were not determined to be thecorrect series then operation 651 control resets the compartment 24 forreceipt of a new crew code. Then, in operation 656, the compartmentstatus data 238 is set to locked and the movement of the compartment 24is prohibited.

If in operation 648, the compartment 24 is not a crew or a passengercompartment 24 and the warning signal is active but the timer has notexpired, then in operation 658 the compartment status data 238 is set tounlatch the compartment 24 and move the compartment 24 into the openedposition.

With reference to FIG. 24 (Compartment Status Procedure), if the CLOSEbutton 48 has been pushed, then with reference to FIG. 30 (“CLOSE”Button Activation Procedure), a process flow diagram illustrates theCLOSE button operational sequence 602 for the compartment 24. When theCLOSE button 48 is pushed, then in operation 660 the power managementroutine is performed, as discussed with regard to FIG. 28 (“OPEN” ButtonActivation Procedure). Next, in operation 662 control determines if thecompartment is disabled or overweight. If the compartment 24 is disabledor overweight, then in operation 664 the compartment status data 238 isoutputted to the indicator module 528.

Otherwise, if the compartment 24 is not disabled or overweight, then inoperation 666, control determines if the compartment 24 is fully closed.If the compartment 24 is not fully closed, then in operation 668 controldetermines if the compartment 24 is fully opened. If the compartment 24is fully opened, then the compartment status data 238 is set to movecompartment 24 into the closed position in operation 670. If thecompartment 24 is not in the fully opened position, then in operation672, control determines if the compartment 24 is in a paused position.If the compartment 24 is in a paused position, then the compartmentstatus data 238 is set to move compartment 24 into the closed positionin operation 674. If the compartment 24 is not in the paused position,then the compartment status data 238 is set to stop the movement of thecompartment 24 in operation 676 and control goes to the stop compartmentoperational sequence 706.

If the compartment 24 is fully closed in operation 666, then inoperation 678, control determines if the compartment 24 is a crewcompartment or a passenger compartment with the warning active and thewarning timer expired. If the compartment 24 is a crew or passengercompartment 24 with the warning active and timer expired, then withreference to FIG. 28A, in operation 650, control determines if a correctcrew code has been inputted. If the latest input to the switch system 40computes a correct number of crew code inputs in operation 650, then inoperation 649, control checks to see if the correct crew code series hasbeen input. If the correct crew code series input has been entered then,in operation 652, the compartment status data 238 is set to open thecompartment 24. If, however, the latest input to the switch system 40does not complete a correct number of crew code inputs, then anadditional button push is added to the crew code, in operation 654. Ifthe correct number of crew code inputs has been recorded in operation650 but, in operation 649 were not determined to be the correct seriesthen operation 651 control resets the compartment 24 for receipt of anew crew code. Then, in operation 656, the compartment status data 238is set to locked and the movement of the compartment 24 is prohibited.

If, in operation 678, the compartment 24 is not a crew or a passengercompartment 24 and the warning signal is active but the timer has notexpired, then in operation 688 the compartment status data 238 is set tounlatch the compartment 24 and move the compartment 24 into the openedposition.

With reference to FIG. 24 (Compartment Status Procedure), if the manualinput has been applied to the compartment 24, then with reference toFIG. 31 (Manual Close Procedure), a process flow diagram illustrates themanual input operational sequence 603 for the compartment 24. Inoperation 690, control determines if current is being supplied to themotor 126. If there is current supplied to the motor 126, then thecompartment status data 238 is set to moving. If there is no currentbeing supplied to the motor 126, then in operation 692, controldetermines if the compartment 24 is fully closed. If the compartment 24is fully closed, then in operation 693 control determines if thecompartment 24 is latched. If the compartment 24 is latched, then thecompartment status data 238 is set to closed. If the compartment 24 isnot latched, then the compartment status data 238 is set to paused inoperation 695. If the compartment 24 is not fully closed, then inoperation 694, control determines if the compartment 24 is fully opened.If the compartment 24 is fully opened, then control determines if thecompartment 24 is in contact with the open sensor 37 in operation 696.If the compartment 24 is in contact with the open sensor 37, then thecompartment status data 238 is set to full opened. If, however, thecompartment 24 is fully opened, but not in contact with the open sensor37, then in operation 698 the CLOSE button operational sequence 600 isperformed.

If the compartment 24 is not fully opened in operation 694, then inoperation 700, control determines if the compartment 24 is manuallybeing pushed towards the closed position. If the compartment 24 is beingmanually pushed towards the closed position, then the CLOSE buttonoperational sequence 600 is performed. If the compartment 24 is notbeing pushed towards the closed position, then the compartment statusdata 238 is set to manual open.

With reference to FIG. 32 (Compartment Activation Procedure), a processflow diagram illustrates a first control method performed by the controlmodule 526 of the compartment control module 204. The first controlmethod is performed when the compartment status data is set to move. Inoperation 702 control checks the compartment status data 238 andmeasures the position of the compartment 24 using the amperage sensor34. Then, in operation 704, control determines if the compartment 24 isin the fully opened or fully closed position. If the compartment 24 isin the fully opened or fully closed position, then control goes to thestop compartment method 706. Otherwise, if the compartment 24 is notfully opened or fully closed, then in operation 708 the measuresposition of the compartment 24 and computes speed of the compartment 24and the desired position of the compartment 24 as discussed herein. Inoperation 710, control determines if the compartment 24 is reversing. Ifthe compartment 24 is reversing, then in operation 712, controldetermines which control current to apply to the motor 126. Then, inoperation 714 the compartment status data 238 is set to moving.

If in operation 710 the compartment 24 is not reversing, then inoperation 716 control determines if the compartment 24 has reversed asufficient amount as set in the parameters of the control system 20 orif the compartment 24 is now fully opened or fully closed. If thecompartment 24 has reversed a sufficient amount or is fully closed orfully opened, then control goes to the stop compartment operationalsequence 706. Otherwise, in operation 718 control determines if thecompartment 24 is closing. If the compartment 24 is closing, then inoperation 720 control applies a reverse current to the motor 126, then,control goes to operation 714. If the compartment is not closing inoperation 718, then control applies a current to the motor in operation722. Then control goes to operation 714.

With reference to FIG. 33 (Halt Motion Procedure), a process flowdiagram illustrates the stop compartment operational sequence 706performed by the control module 526 of the compartment control module204. In operation 724 control stops the compartment 24 motion processingthread, then in operation 726 control sets the applied motor current tozero. In operation 728 control sets the compartment status data 238 tostopped.

Referring now to FIG. 34 (Set Light/indication Procedure), a processflow diagram illustrates an indicator status method performed by theindicator module 528 of the compartment control module 204. Theindicator status method determines the proper illumination of the LEDs52 associated with the indicator surface 50.

In operation 730, control determines if the compartment 24 is disabledbased on if the compartment status data 238 is set to disabled. If thecompartment status data 238 is set as disabled, then there is noillumination of the LED 52 and any previous illumination is turned off.If the compartment 24 is not disabled, then in operation 732 controldetermines if the compartment status data 238 is set to obstructed. Ifthe compartment status data 238 is set as obstructed, then controloutputs indicator data 236. The indicator data 236 output from operation732 can comprise a series of illuminations of the LEDs 52 such asilluminating LED 52 b, LED 52 b, LED 52 a, LED 52 a in order every 500milliseconds. If the compartment status data 238 is not set asobstructed, then in operation 734 control determines if the compartmentstatus data 238 is set as overweight. If the compartment status data 238is set as overweight, then indicator data 242 is outputted in aparticular pattern such as illuminating LED 52 b and illuminating LED 52a in flashing intervals every 500 milliseconds. If, however, thecompartment status data 238 is not overweight, then in operation 736control determines if the warning is active and the warning timer hasexpired. If the warning is active and the warning timer has expired,then control checks in operation 739 to see if an incorrect crew codehas been entered recently. If an incorrect crew code has been entered,then control sets the LEDs to remain unilluminated for 1000 ms inoperation 741. If an incorrect crew code has not been entered, thencontrol goes to a timed-out indicator operational sequence 738.Otherwise, if the warning is active and the warning indicator has nottimed-out, then control goes to a not timed-out indicator operationalsequence 740.

With reference to FIG. 35 (Set Light/Indication Procedure (FSB ON andTimed Out)), a process flow diagram indicates the timed-out indicatoroperational sequence 738. In operation 742, control determines if thecompartment status data 238 is set as fully closed. If the compartmentstatus data 238 is set as fully closed, then in operation 744 controldetermines if the compartment status data 240 is set to latched. If thecompartment status data 238 is set to latched, then the indicator data242 can be set such that LED 52 a is illuminated. If the compartmentstatus data 238 is set to unlatched, then LED 52 a can be set to flashat 1,000 millisecond intervals.

If in operation 742 the compartment status data 238 was not set to fullyclosed, then in operation 746 control determines if the compartmentstatus data 238 indicates that the compartment 24 is a passengercompartment 24. In operation 752, if the compartment 24 is a passengercompartment, then the indicator data 236 can be set to illuminate LED 52a in flashing intervals of 1,000 milliseconds. Otherwise, if thecompartment 24 is not a passenger compartment, then the indicator data236 can be set to illuminate LED 52 b in 1,000 millisecond flashingintervals.

With reference now to FIG. 36 (Set Light/Indication Procedure (FSB ONand Not Timed Out)), a process flow diagram illustrates the “nottimed-out” indicator operational sequence 740. In operation 748, controldetermines if the compartment status data 238 is set as closed. If thecompartment status data 238 is not set as closed, then in operation 750control determines if the compartment status data 238 indicates that thecompartment 24 is paused or fully opened. If the compartment 24 is notpaused or fully opened, then the indicator data 236 can be set toilluminate LED 52 b at 1,000 millisecond intervals, for example. If,however, the compartment 24 is paused or fully opened, then controldetermines if the compartment status data 238 indicates that thecompartment 24 is operating within its “X”-range limit. Over the fullrange of the compartment motion there are two sections: there is thesection “X” and the section “Y”, as shown in FIG. 36A (Compartment Rangeof Motion). Section “X” is a preset percentage of the full rangemeasured from the full closed position. This separation is to aid in theindication of the direction of the motion of the compartment 24 andlocation of the compartment 24, as shown in FIG. 36A (Compartment Rangeof Motion). In operation 752, if the compartment 24 is not operatingwithin its “X”-range limit, then indicator data 236 can be set toilluminate LED 52 b. Otherwise, if the compartment 24 is within its“X”-range limit, then indicator data 236 can be set to illuminate LED 52b in 100 millisecond flashing intervals to signify that the position ofthe compartment 24 is nearing fully closed. This signifies that theoperation of the compartment 24 is nearing or leaving the full closedposition.

If in operation 748 the compartment status data 238 is set as notclosed, then in operation 754 control determines if the compartment 24is a passenger compartment. If it is not a passenger compartment 24,then in operation 756 control determines based on the compartment statusdata 238 if the compartment 24 is latched. If the compartment 24 is notlatched, then the indicator data 236 is set as illuminating LED 52 a inflashing 100 millisecond intervals by designating different LED 52signals. If the compartment 24 is latched, then the indicator data 236can be set to illuminate LED 52 a. If the compartment 24 is a passengercompartment 24, then in operation 758 control can determined based onthe compartment status data 238 if the compartment 24 is latched. If thecompartment 24 is not latched, then the indicator data 236 can be set asilluminating LED 52 b in 100 millisecond flashing intervals. If thecompartment 24 is latched, then the indicator data 236 can be set toilluminate LED 52 b.

With reference to FIG. 37 (System Shutdown Procedure), a process flowdiagram illustrates a shutdown method performed by the shutdown module206. Upon receipt of a shutdown signal 760, in operation 762 controldetermines if all the compartments 24 are closed based on thecompartment status data 238. If all of the compartments 24 are closed,then in operation 764 control closes communication with the compartmentcontrollers 30. Then, in operation 766 control sends a shutdown command230 to the compartment control module 204 to power down. If all thecompartments 24 are not closed, then in operation 768 control determinesbased on the shutdown signal 760 if it is necessary to wait to make sureall of the compartments 24 are closed. If it is not necessary to waitfor all the compartments to close, such as in an emergency, then controlgoes to operation 764. Otherwise, if control needs to make sure allcompartments 24 are closed, then control goes to operation 770.

In operation 770, control starts a timer. In operation 771, controlcommands all the compartments 24 to close. Then, in operation 772,control determines if all compartments 24 are closed. If all thecompartments 24 are closed, then control goes to operation 764.Otherwise, if there are compartments 24 opened, then control determinesif enough time has passed for all compartments 24 to be closed. Inoperation 774, if not enough time has passed, then control loops tooperation 772. If, however, enough time has passed, then control goes tooperation 778. In operation 778, control runs the test of the controlsystem 20 as previously described herein. Then control goes to operation780. In operation 780, the hardware system test is performed, which waspreviously described herein. At the end of the hardware system test,operation 782 is performed in which it is determined if there are anyfaults. If there are no faults detected at operation 782, then atoperation 786 data is output that indicates that all compartments 24 maynot be closed and the system tests show no errors. Then control loops tooperation 764. If there are faults, however, in operation 788 controloutputs data 247 that indicates that all compartments 24 may not beclosed and also sends the system fault data. Then, in operation 790,control determines whether to control to power down based on the errors.If control decides to not power down, then in operation 792 controlstops the shutdown procedure and indicates faults. Otherwise, controlloops to operation 764.

With additional reference to FIG. 38, the GUI 248 information used tocreate the GUI control panel 249 by the GUI manager module 208 is shown.The GUI control panel 249 is preferably composed of various GUIs, suchas, but not limited to, a “Flight Information” GUI 792, a“Communication” GUI 794, a “Bin Control” GUI 796, an “Inventory” GUI798, a “Cabin Settings” GUI 800, and an “Emergency” GUI 802. As the “BinControl” GUI 796 and the “Cabin Settings” GUI 800 are the GUIs mostrelated to the control of the compartments 24, only these two GUIs willbe discussed in detail herein. The GUIs can be selected from variousmenu tabs as indicated. The GUIs can be selected through any appropriateuser input device, such as a touch-screen, a pointer or other devicecapable of providing the user input data 246. It should be noted thatthe GUI control panel 249 can be ran by control system 20, specificallythe central controller 32 and displayed on the control panel 33,however, with reference to FIG. 39, the GUI control panel 249 couldadditionally be displayed at a variety of user interface stations 799that can each interface with the central controller 32 and/or with thecompartment controllers 30 interfacing directly between the compartments24 and the central controller 32. Alternatively, a control system 20′could employ zone controllers 801 as an interface between selectedcompartments 24 and the central controller 33, however, any combinationof control system 20, 20′ could be employed.

With reference back to FIG. 38, the “Bin Control” GUI 796 includes adisplay screen 803, a sub-menu 804, a sub-menu display screen 806, a topdisplay 808, an “End Program” button 809 and an indicator box 810. Thedisplay screen 803 preferably includes at least one or a plurality ofcompartment indicators 812, a legend 814 and location indicators 816.The compartment indicators 812 are generally arranged in a configurationcorresponding to the layout of the compartments 24 in the mobileplatform 10. For example, the compartments 24 are arranged in six rowsof four abreast seating to correspond to the six rows of seating of themobile platform shown in FIG. 1. The compartments 24 are illustrated asrectangles, however, any appropriate representation of the compartments24 could be employed, such as, but not limited to, squares, ovals,trapezoids or other polygons or symbols. The compartment indicators 812have a body 817. The body is generally configured to change color uponthe selection of the compartment 24 by the indicator. For example, thebody 817 of the compartment indicator 812 can change to a dark grey uponselection by the operator. The body 817 of the compartment indicators812 includes an indicator surface 818, a first indicator 820, a secondindicator 822 and a third indicator 824.

The indicator surface 818 is configured to display a designationassociated with the compartment 24. For example, the indicator surface818 could display a symbol, such as a cross, to indicate that thecompartment 24 contains emergency equipment, or the indicator surface818 could display a symbol, such as a letter “C” to indicate that thecompartment 24 is designated as a compartment 24 for use by the crew, oran appropriate symbol to show that the compartment has been designatedas manually disabled, such as a strikethrough. The first indicator 820is configured to display a class or a zone that the compartment 24 isdesignated. For example, the classes could be first class, businessclass or economy class. Generally, the first indicator 820 displays acolor associated with the particular class, as will be discussed herein,but the first indicator 820 could display a symbol associated with theparticular class.

The second indicator 822 is configured to indicate a volume and weightof the compartment 24 based on the received compartment status data 240.The second indicator 822 is shown as a bar, however, the secondindicator 822 could be any appropriate shape, such as a line. The colorof the second indicator 822 indicates how full the compartment 24 iswith respect to weight. If the second indicator 822 is a color yellow,then the compartment is almost full, while a color green indicates thatthe compartment 24 is nearly empty, and a color red indicates that thecompartment 24 is at capacity with regard to weight. The length orheight of the second indicator 822 indicates the volume of thecompartment 24. A fully extended (high height) colored area on thesecond indicator 822 indicates that the compartment 24 is almost full,while a short length (low height) indicates that the compartment 24 isempty with regard to volume.

The third indicator 824 is configured to indicate a status of theindicator surface 50 based on the indicator data 242. The thirdindicator 824 is illustrated as rectangular, however, any appropriateshape could be used such as oval. As the third indicator 824 replicatesthe indicator data outputted by the indicator module 528, the thirdindicator 824 can alternate between the colors of the LEDs 52, such as acolor red and a color blue.

The legend 814 is generally disposed near a bottom surface 836 of thedisplay screen 803. The legend 814 is illustrated to associate theavailable class designation colors used with the first indicators 820with their respective classes. For example, the legend 814 includesthree panels. A first panel 836 a is colored to match the colorassociated with first class by the first indicator 820 and includes thetext “First Class,” while a second panel 836 b is colored to correspondto the color associated with business class and includes the text“Business Class” and a third panel 836 c is colored to correspond withthe color associated with economy class and includes the text “EconomyClass.” The location indicators 816 enable the operator to relate thecompartment indicators 812 to the compartments 24 on the mobile platform10. Thus, the location indicators 816 facilitate the operator'sassociation of the compartments 24 with the configuration of the mobileplatform 10. The location indicators 816 can be directional with regardto the mobile platform 10, such as right or left, and can include fixedstructures to further assist in the association of the compartmentindicators 812 with the compartments 24.

The sub-menu 804 includes at least one or a plurality of sub-GUIsdisplayed on the sub-menu display screen 806, such as a “Controls” GUI844, a “Settings” GUI 846, a “Security” GUI 848, a “Configuration” GUI850 and an “Indicators” GUI 851 (FIG. 57) that can be selected via theuser input data 246. The “Controls” GUI 844 includes a selection box852, and function or operational buttons 854.

The selection box 852 is configured to enable the operator to select atleast one or a plurality of compartments 24 to operate. It should benoted that although the selection box 852 is illustrated as being near atop portion of the sub-menu display screen 806, the selection box 852could be in any desired location. The selection box 852 includes radiobuttons 856, however, any type of selector could be employed. The radiobuttons 856 and their associated text 858 correspond to a respectivenumber of compartments 24 in the mobile platform 10, and can be keyed tomatch the compartment indicators 812. For example, a first radio button856 a is configured to correspond to all the compartments 24 in themobile platform 10, and is labeled “Select All Bins,” while a secondradio button 856 b is configured to enable operation of at least one ora plurality of user selected compartments 24, and is labeled “SelectedBins.”

A third radio button 856 c is configured to correspond to all of thecompartments 24 designated as “First Class” compartments 24, andincludes the text “First Class” in a box 860 c colored to correspond tothe color of the legend corresponding to “First Class” and thecorresponding color of the first indicator 820. A fourth radio button856 d is configured to correspond to all of the compartments 24designated as “Business Class” compartments 24, and includes the text“Business Class” in a box 860 d colored to correspond to the color ofthe legend corresponding to “Business Class” and the corresponding colorof the first indicator 820. A fifth radio button 856 e is configured tocorrespond to all of the compartments 24 designated as “Economy Class”compartments 24, and includes the text “Economy Class” in a box 860 ecolored to correspond to the color of the legend corresponding to“Economy Class” and the corresponding color of the first indicator 820.

When the first, third, fourth and fifth radio buttons 856 a, 856 c, 856d, 856 e are selected the body 817 of the respective compartmentindicators 812 changes to a darker shade than the other unselectedcompartment indicators 812 to visually indicate which compartments 24are selected. When the third radio button 856 c is selected, the usermanually inputs the desired compartments 24 via the user input data 246.This can be achieved by selecting the desired compartments 24 via therespective compartment indicators 812 through any suitable user inputdevice.

The operational buttons 854 are configured to enable the compartments 24selected in the selection box 852 to perform a function. It should benoted that although the operational buttons 854 are illustrated as beingnear a bottom portion of the sub-menu display screen 806, theoperational buttons 854 could be in any desired location. For example, afirst or OPEN button 862 is configured to send GUI data 232 to thecompartment control module 204 to open the group of compartments 24selected by the radio buttons 856 or the individually selected group ofcompartments 24 selected by the operator. A second or CLOSE button 864is configured to send GUI data 232 to the compartment control module 204to close the group of compartments 24 selected by the radio buttons 856or the individually selected group of compartments 24 selected by theoperator.

With reference to FIG. 40, the “Settings” GUI 846 includes a firstselector box or “Zone/Type” selector 866, a second selector box or “BinType” selector 868 and a third selector box or “Zone Location” selector888. The “Settings” GUI 846 is generally protected, as will be discussedherein. The “Zone/Type” selector 866 includes a “Bin Type” radio button890 and a “Zone Type” radio button 892. The “Bin Type” radio button 890,once selected, enables the “Bin Type” selector 868, while the “ZoneType” radio button 892, once selected, enables the “Zone Location”selector 888. The disabled selector can appear lighter in color to theactive selector.

The “Bin Type” selector 868 includes a first or “Passenger” radio button890, a second or “Crew” radio button 892, a third or “EmergencyEquipment” radio button 894, a fourth or “Latch and Disable” radiobutton 896, and a “Restore Defaults” button 898. While the “Passenger”radio button 890 is selected any compartment surface(s) 818 selectedwill designate that compartment as a passenger compartment 24 which isindicated by the lack of a crew, emergency equipment cross, disabled, orother symbol. While the “Crew” radio button 892 is selected anycompartment surface(s) 818 selected will designate that compartment as acrew compartment 24, and the “Emergency Equipment” radio button 894causes a selected compartment indicator 812 to be designated as anemergency equipment compartment 24. The “Latch and Disable” radio button896 enables a selected compartment indicator 812 to be designated asdisabled. The “Restore Defaults” button 898 resets the compartmentindicators 812 to the original settings.

With reference to FIG. 41, the “Zone Location” selector 888 includes afirst or “First Class” radio button 900, a second or “Business Class”radio button 902, a third or “Economy Class” radio button 904, and a“Restore Defaults” button 906. The “First Class” radio button 900enables an operator to associate a compartment indicator(s) 812 withFirst Class and changes the appropriate compartment indicators 812. The“Business Class” radio button 902 enables an operator to associate acompartment indicator(s) 812 with Business Class, and the “EconomyClass” radio button 904 allows an operator to associate a compartmentindicator(s) 812 with Economy Class. The “Restore Defaults” button 906resets the compartment indicators 812 to the original settings.

In order to designate the settings of the compartments 24, one of the“Bin Type” radio button 890 and the “Zone Type” radio button 892 of the“Zone/Type” selector 866 is selected. If the “Bin Type” selector 868 isactivated, then the desired radio button 890, 892, 894, 896 or the“Restore Defaults” button 906 is selected. To designate the compartment24, after the radio button 890, 892, 894, 896 is selected, the desiredcompartment indicator 812 is selected.

If the “Passenger” radio button 890 is selected, then after thecompartment indicator 812 is selected, the indicator 818 of thecompartment indicator 812 will remain constant in color. If the “Crew”radio button 892 is selected, then after the compartment indicator 812is selected, the indicator 818 of the compartment indicator 812 willinclude a “C” to designate the compartment 24 as a crew compartment 24.“Emergency Equipment” radio button 894 is selected, and after thecompartment indicator 812 is selected, the indicator 818 of thecompartment indicator 812 will include a cross to designate thecompartment 24 as an emergency equipment compartment 24. If the “Latchand Disable” radio button 896 is selected, then after the compartmentindicator 812 is selected, the indicator 818 of the compartmentindicator 812 will include a strikethrough symbol.

If the “Zone Location” selector 888 is activated, as shown in FIG. 41,then the desired radio button 900, 902, 904 or the “Restore Defaults”button 906 is selected. If the “First Class” radio button 900 isselected, the operator selects the desired compartment indicator(s) 812that are to be associated with First Class. Then, the first indicator820 of the selected compartment indicator(s) 812 updates to correspondto the color associated with First Class. If the “Business Class” radiobutton 902 is selected, then the operator selects the desiredcompartment indicator(s) 812 that are to be associated with BusinessClass, and the first indicator 820 of the selected compartmentindicator(s) 812 updates to correspond to the color associated withBusiness Class. If the “Economy Class” radio button 904 is selected,then the operator selects the desired compartment indicator(s) 812 thatare to be associated with Economy Class, and the first indicator 820 ofthe selected compartment indicator(s) 812 updates to correspond to thecolor associated with Economy Class. The “Bin Type” selector 868 and“Zone Location” selector 888 can work together to allow the user todesignate the compartment type or zone location of multiple compartments24 at once.

With reference now to FIG. 42, the “Security” GUI 848 is illustrated.The “Security” GUI 848 designates the security protocols used to accessthe restricted areas of the GUI manager module 208 and is securityprotected itself. A user is required to be logged in to change or viewthese settings as will be discussed herein. The available securityprotocols are selected by associated radio buttons. For example, the“Security” GUI 848 includes a “Code” radio button 908, a “RFID” radiobutton 910, a “Biometric” radio button 912, a “Retina Scan” radio button914, and an “Other” radio button 916. The “RFID” radio button 910,“Biometric” radio button 912, and “Retina Scan” radio button 914 arecommonly known security protocols and are not discussed in detailherein.

The “Code” radio button 908 provides password protection to therestricted areas of the GUI manager module 208, and the “Other” radiobutton 916 enables client specific security protocols to be selected. Ifthe “Code” radio button 908 is selected, then with reference to FIG. 43,in order to login to access the restricted areas of the GUI managermodule 208, an operator selects a “Login” button 918 from the topdisplay 808. A user name and password prompt screen 920 is displayed,and the operator can enter his/her user name and password in respectivetext boxes 922. Once the operator has logged in, then the button 918displays “Logout” as is generally known. The control also updates theuser or associated username 1086 to display the entered name of the userwho is logged in. When no user is logged in the user identification box1086 displays “unsecured”. Secure operation has a timer. For example,five minutes after a user has logged in, the control resets the settingsto an “unsecured” setting. This is to prevent unauthorized use of theGUI Control Panel 249.

With reference now to FIG. 44, the “Configuration” GUI 850 isillustrated. The “Configuration” GUI 850 includes a first or “AircraftModel” selector box 924, a second or “Bin open/close time” selector box926, and a sub-menu 928. The “Configuration” GUI 850 is restricted. The“Aircraft Model” selector box 924 enables the user to select theaircraft or mobile platform 10 to which the compartment control system20 is employed from a drop-down menu 930. For example, a Boeing 747 canbe selected. The “Bin open/close time” selector box 926 enables the userto set a nominal close time in seconds for the compartments 24 with afirst scroll button 932 and a deviation for the nominal close time inseconds with a second scroll button 934; although any suitable selectorcould be employed.

With reference to FIGS. 44-56, the sub-menu 928 includes a “Bin Size”GUI 936, a “Crew Code” GUI 938, a “Volume Sensing” GUI 940, a “Language”GUI 942, a “Profile” GUI 944, an “Emergency Lockout” GUI 946, a“Maintenance” GUI 948, a “Weight Sensing” GUI 950, a “Feedback” GUI 952,a “Power Allocation” GUI 954 and a “Current” GUI 956. Scroll tabs 958are used to move amongst the GUIs of the sub-menu 928.

With reference to FIG. 44, the “Bin Size” GUI 936 includes a pluralityof radio buttons 960 that are each associated with a respective lengthin inches of the compartments 24 on the mobile platform 10. For example,five radio buttons 960 could be employed designated lengths of eachselected compartment 24 of 24 inches (in.), 30 in., 40 in., 48 in., orother to enable client specific lengths to be inputted. Each compartmentsurface 818 will have a size designator that appears only when the “BinSize” GUI 936 is active. A “restore defaults” button returns thecompartment sizes to their original settings (not shown).

With reference now to FIG. 45, the “Crew Code” GUI 938 includes aplurality of check boxes 962 and a scroll bar 964. The “Crew Code” GUI938 enables the operator to set a crew code comprised of a series ofpresses to the OPEN or CLOSE buttons 46, 48 of the switch to enableaccess to the crew compartments 24 or compartments 24 after the warningis active. A first column of check boxes 962 a are designated as “Open”and a second column of check boxes 962 b are designated as “Close.” Thecheck boxes 962 designated as “Open” correspond to pressing the OPENbutting 46 and the check boxes 962 designated as “Close” correspond topressing the CLOSE button 48.

The check boxes 962 are arranged in a plurality of numbered rows thatcorrespond to the code sequence. For example, there can be six rows,numbered one to six, which correspond to the order in which the OPENbutton 46 or CLOSE button 48 of the switch system 40 must be pressed.The scroll bar 964 enables the operator to set the amount of timepermitted to enter the crew code in seconds. By sliding the scroll bar964, the operator can vary the time as desired. For example, asillustrated in FIG. 45, the crew code requires pressing the OPEN button46 twice and then the CLOSE button 48, and then the OPEN button 46within four seconds to gain access to crew compartments 24 orcompartments 24 after the warning is active, as discussed herein.

With reference to FIG. 46, the “Volume Sensing” GUI 940 is illustrated.The “Volume Sensing” GUI 940 includes a “On” radio button 966 and an“Off” radio button 968 to enable the operator to turn thevolume/compartment capacity sensing on and off. With reference to FIG.47, the “Language” GUI 942 is illustrated. The “Language” GUI 942includes a drop-down menu 970 to enable the operator to set the languagefor GUI 248 generated by the GUI manager module 208.

Referring to FIG. 48, the “Profile” GUI 944 is illustrated. The“Profile” GUI 944 includes a first or “Manual” radio button 972, asecond or “Auto” radio button 974, a third or “Smooth” radio button 976,and a display 978. The “Profile” GUI 944 enables the operator to selectthe desired opening and closing motion profile for the actuator system26 of the compartments 24. The profiles are set as desired to provide anaesthetically pleasing movement of the compartments 24 within the cabin14. The profile for each radio button 972, 974, 976 is illustrated inthe display 978 upon the selection of the radio buttons 972, 974, 976.

The “Manual” radio button 972 provides a manual motion profile 972 a asillustrated in FIG. 48. The manual motion profile 978 a is characterizedby a sharp beginning and ending motion. The manual mode is run off acalculated maximum velocity of the motor 125. Based on the computedmaximum velocity of the motor 125, control accelerates and deceleratesthe compartment 24 to the maximum velocity using a ramp function. Thediscontinuities within the profile can create additional wear on themechanical components of the power-assisted compartment system 12 butresult in quick motion changes. The time from start to maximum velocityand from maximum velocity to full stop is very short. The manual motionprofile 972 a is a precalculated preset mode with no real-time updatingor adjustment to compensate for factors that may make the compartment 24travel less than optimally.

With reference to FIG. 50, the “Smooth” radio button 974 provides anautomatically computed motion profile 978 b as illustrated. Theautomatically computed motion profile 978 b is more smooth than theother motion profiles and creates the most aesthetic motion and causesthe least wear on mechanical components of the power-assistedcompartment system 12. The smooth mode would provide a smooth movingprofile for the compartment 24 based off a desired time for thecompartment 24 to move from closed to fully opened using input valuesfor the percentage of time to accelerate and the percentage of time todecelerate. In order to minimize wear on the motor 126, the smooth modeis computed to create smooth position, velocity, and accelerationprofiles, as shown in FIG. 49A. As referred to herein, the first sectionis characterized by the beginning of movement or acceleration of thecompartment 24, the second two is characterized as the mid-rangemovement, or constant velocity section, of the compartment 24, andsection three is the ending of the movement of the compartment 24. Inorder to compute the smooth position, velocity and accelerationprofiles, the following parameters are inputted:

(1) T₃, wherein T₃ is the desired amount of time for a full cycle (i.e.fully opened to closed or vice versa);

(2) P₃(T₃), wherein P₃(T₃) is the total distance, and can be a radialmeasurement representing the full sweep of the compartment 24 (i.e. theangular displacement from fully opened to fully closed);

(3) AP, where AP is a percentage of the total time required toaccelerate and is used to compute the duration for section one of theprofile, where the duration for section one of the profile is equal to:

T ₁ =T ₃ *AP/100.  (12)

(4) The duration of sections two and three of profile is computed usingAD, wherein AD is a percentage of the total time required to decelerate,amounting to the duration for sections two and three of the profile, andis equal to:

Section₃ =T ₃ *DP/100; T ₂ =T ₃−Section₃  (13)

Variables of the automatic mode computation include MV, wherein MV isequal to the maximum velocity. The maximum velocity is determined from atrigonometric function. The basic trigonometric function form is used,wherein:

a*sin²(b*t+c)  (14)

The basic trigonometric function maximizes profile continuity andsmoothness, while potentially minimizing acceleration and decelerationintervals.

wherein a represents the function amplitude, b represents the functionperiod, and c represents the horizontal shift of an equation to maintaincontinuity. The base trigonometric function for the velocity profile isin the form of:

MV=a*sin²(b*t)  (15)

wherein a is equal to the amplitude, which is equal to MV, the maximumvelocity. In order to calculate the velocity profile, the followingequations are derived and used:

V ₁(t)=MV*sin²(b ₁ *t)  (16)

V ₂(t)=MV  (17)

V ₃(t)=MV*sin²(b ₃ *t+c ₃)  (18)

wherein b₁ is the b constant of the velocity function for section one ofthe motion profile, b₃ is the b constant of the velocity function forsection three of the motion profile, and C₃ is the c constant of thevelocity function for section three of the motion profile, V₁(t) is thevelocity equation for section one, V₂(t) is the velocity equation forsection two, and V₃(t) is the velocity equation for section three.

In order to compute the motion profile for the position, the followingequations are used:

P ₁(t)=∫V ₁(t)dt=MV∫sin²(b ₁ *t)dt  (19)

P ₁(t)=MV/(2*b ₁)*[b ₁ *t−(2*b ₁ *t)/2]+D ₁  (20)

wherein D₁ is the constant for section one, and is introduced when thevelocity equation is integrated to determine the position equation.Further, it will be noted that t=0 at the start of section one, andtherefore P₁(t)=0, and D₁=0. In order to determine the motion profilefor the position at section two, the following equation is used:

P ₂(t)=MV*(t−T ₁)+P ₁(T ₁)  (21)

In order to determine the motion profile for the position at sectionthree, the following equation is used:

$\begin{matrix}\begin{matrix}{{P_{3}(t)} = {\int{{V_{3}(t)}{t}}}} \\{= {{{MV}/b_{3}}{\int{\sin \; 2\left( {{b_{3}*t} + c_{3}} \right){\left( {{b_{3}*t} + {c\; 3}} \right)}}}}} \\{= {{{{MV}/\left( {2*b_{3}} \right)}*\left\lbrack {\left( {{b_{3}*t} + c_{3}} \right) - {{\sin \left( {{2*b_{3}*t} + {2*c_{3}}} \right)}/2}} \right)} + D_{3}}}\end{matrix} & \begin{matrix}(22) \\\; \\\; \\\; \\(23) \\\;\end{matrix}\end{matrix}$

wherein at t=T₃ and P₃(t)=P₃(T₃), then D₃ can be computed using thefollowing equation:

D ₃ =P ₃(T ₃)−MV/(2*b ₃)*[b ₃ *T ₃ +c ₃−sin(2*b ₃ *T ₃+2*c ₃)/2]  (24)

With D₃ computed, D₃ is substituted into the equation for P₃(t) toarrive at:

$\begin{matrix}{{P_{3}(t)} = {{{{MV}/\left( {2*b_{3}} \right)}*\left\lbrack {{b_{3}*\left( {t - T_{3}} \right)} - {{\sin \left( {{2*b_{3}*t} + {2*c_{3}}} \right)}/2} + {{\sin \left( {{2*b_{3}*T_{3}} + {2*c_{3}}} \right)}/2}} \right\rbrack} + {P_{3}\left( T_{3} \right)}}} & (25)\end{matrix}$

wherein D₃ is the constant for section three and is introduced when thevelocity equation is integrated to determine the position equation, andT₃ is the required time for total compartment 24 movement.

In order to compute the motion profile for the acceleration of thecompartment 24, the following equations are used:

A ₁(t)=V ₁(t)  (26)

A ₁(t)=b ₁ *MV*sin(2*b ₁ *t)  (27)

A ₂(t)=0  (28)

A ₃(t)=b ₃ *MV*sin(2*b ₃ *t+c ₃)  (29)

In order to compute the maximum velocity MV, which is related to relatedto maximum current, and thus, system power draw and power management,the following equations are used:

MV=rise/run  (30)

MV=P ₃(T ₂)−P ₁(T ₁)/(T₂ −T ₁)  (31)

wherein in equation (27) the above equations are substituted in,resulting in:

$\begin{matrix}{{MV} = \frac{{- 2}*{P_{3}\left( T_{3} \right)}}{\begin{matrix}{{- T_{2}} - T_{3} + T_{1} - {{1/\left( {2*b_{3}} \right)}*}} \\{\left\lbrack {{\sin \left( {2*\left( {{b_{3}T_{3}} + c_{3}} \right)} \right)} + {\sin \left( {2*\left( {{b_{3}*T_{3}} + c_{3}} \right)} \right)}} \right\rbrack +} \\{{\sin \left( {2*b_{1}*T_{1}} \right)}/\left( {2*b_{1}} \right)}\end{matrix}}} & (31)\end{matrix}$

Additionally, based on the values received in the above equations, thefollowing constants are computed:

b ₁ =∫I/T ₁  (32)

b ₃ =∫I/(T ₃ −T ₂)  (33)

c ₃ =A sin(0)−b ₃ *T ₃  (34)

Referring now to FIG. 49, the “Auto” radio button 976 is self-updating.It is a more sophisticated version of the manual motion profile. Whenthe “Auto” radio button 976 is selected, control operates thecompartment 24 at a set velocity to maintain a set time to fully open orfully close the compartment 24. When operating on the automatic motionprofile, control can instantaneously increase or decrease the suppliedcurrent, and thus the velocity of the compartment 24. A change incharacteristics of the compartment 24 such as an increase in weight or auser pulling down on the compartment 24 as it is closing would causecontrol to instantaneously increase the supplied current to maintain thenecessary velocity required to ensure that the full motion of thecompartment 24 was completed within the designated time.

With reference to FIG. 51, the “Emergency Lockout” GUI 946 isillustrated. The “Emergency Lockout” GUI 946 includes a first or“Immediate Lockout Option” selector box 978 and a “Duration” scroll bar980. The “Immediate Lockout Option” selector box 978 can include a firstor “1 Fasten Seatbelt Chime” radio button 982, a second or “2 FastenSeatbelt Chime” radio button 984, a third or “3 Fasten Seatbelt Chime”radio button 986 and a fourth or “4 Fasten Seatbelt Chime” radio button988. The numerals (1, 2, 3, 4) of the radio buttons 982, 984, 986, 988indicate the number of times the warning or Fasten Seatbelt chime has tobe activated by user input data 246 from the pilot of the mobileplatform 10 to result in an immediate lockout of the compartments 24. Asillustrated, with the “2 Fasten Seatbelt Chime” radio button 984selected, the pilot will need to activate the warning twice to lockoutthe compartments 24.

Referring now to FIG. 52, the “Maintenance” GUI 948 is illustrated. The“Maintenance” GUI 948 includes a first or “Download DataLog” button 990,a second or “Run System Test” button 992, a third or “Display Faults”button 994, a fourth or “Clear Faults” button 996 and a fifth or “SendError Report” button 998. The “Download Data Log” button 990 sends datalog information captured during the operation of the compartments 24 toa remote printer (not shown) or file. The compartment control module 204maintains a data log of all parameters, events, and faults that occurduring operation. For example, the following are some of the parameters,events, and faults that are logged and time-stamped: Compartment 24type, OPEN button 46 pressed, CLOSE button 48 pressed, compartment 24unlatching, compartment 24 unlatched, compartment 24 opening,compartment 24 fully opened, compartment 24 closing, compartment 24fully closed, compartment 24 latched, compartment 24 lifted off opensensor 37, motor 126 control current, compartment 24 position,compartment 24 speed, second sensor 36 pressed, motor 126 over currentobstruction, compartment 24 obstructed, compartment 24 reversingdirection, compartment 24 estimated weight, and LED(s) 52 color(s).

The “Run System Test” button 992 enables the operator to test thecompartment control system. When the operator selects the “Run SystemTest” button 992, the GUI data 232 instructs the compartment controlmodule 206 to run the hardware test and the software test to ensure allsensors and signals are running properly, as discussed herein. Reportdata from these tests is output to a remote printer (not shown) or file.The “Display Faults” button 994 displays any current fault data 244 fromthe compartment control module 204. The “Clear Faults” button 996 clearsany fault data 244 from the compartment control module 204. The “SendError Report” button 998 sends the fault data 244 to a remote system(not shown).

With reference to FIG. 53, the “Weight Sensing” GUI 950 is illustrated.The “Weight Sensing” GUI 950 includes a first or “Overweight Sensing”selector box 1000 and a second or “Weight Balance Calculation” selectorbox 1002. The “Overweight Sensing” selector box 1000 includes a first or“Off” radio button 1004 and a second or “On” radio button 1006. Theradio buttons 1004, 1006 enable the operator to toggle the overweightsensing between on and off.

The “Weight Balance Calculation” selector box 1002 includes a first or“Off” radio button 1008 and a second or “On” radio button 1010. Theradio buttons 1008, 1010 enable the operator to toggle the weightbalance calculation between on and off. If active, the weight balancecalculation generates a display 1012 that indicates whether the weightis distributed evenly over the mobile platform 10. Generally, the weightbalance calculation is computed by summing the weight in each side ofthe compartments 24. The display 1012 includes a color indicator bar1012, a color text box 1014 and a balance bar 1016. The color indicatorbar 1012 can be tri-color to provide an indication of the weight balanceand is generally configured to correspond with the display 802 of themobile platform 10. The color text box 1014 displays the current colorassociated with the weight balance, such as “Yellow,” “Red” or “Green.”The bar 1016 indicates the current weight balance. For example, in FIG.53, the bar 1016 indicates that the right side of the mobile platform 10is heavier than the left side.

The “Feedback” GUI 952 is illustrated in FIG. 54. The “Feedback” GUI 952includes a first or “Audible” check box 1020, a second or “Tactile”check box 1022, and a third or “Visual” check box 1024. Any number ofthe check boxes 1020, 1022, 1024 can be selected by the operator tocustomize the feedback provided by the system.

Referring now to FIG. 55, the “Power Allocation” GUI 954 is illustrated.The “Power Allocation” GUI 954 includes a first or “Power Allocation”selector box 1026 and a second or “Power Shed by . . . ” selector box1028. The “Power Allocation” selector box 1026 includes a scroll bar1030 to enable the operator to select the maximum instantaneousallowable power draw in watts (W) for the power-assisted compartmentsystem 12.

The “Power Shed by . . . ” selector box 1028 enables the operator todetermine the manner in which the compartment control system reduces itspower consumption, and include a first or “Unit” radio button 1032, asecond or “Zone” radio button 1034 and at least one or a plurality of“Other” radio buttons 1036. The “Unit” radio button 1032 instructs thecompartment control system to reduce power by allowing only one unit ineach zone to open at a time. The “Zone” radio button 1034 instructs thecompartment control system to reduce power usage by prioritizing powerusage based on the zone of the compartment 24, such as first class,business class and economy class. The “Other” radio buttons 1036 enablecustom client power shed mechanisms to be implemented.

The “Current” GUI 956 is illustrated in FIG. 56. The “Current” GUI 956enables the operator to set the maximum allowable current draw inmilli-Amperes (mA) with a scroll bar 1038. The “Current” GUI 956 thusalso provides another method to control the speed of the motor 126.

The sub-menu 804 further includes the “Indicator” GUI 851 as illustratedin FIG. 57. The “Indicator” GUI 851 includes a “Types of Indicators”menu 1038. The “Types of Indicators” menu 1038 includes a “Visual” GUI1040, a “Tactile” GUI 1042, an “Audible” GUI 1044, and a “Other” GUI1046. The “Other” GUI 1046 enables the inclusion of client specificindicators on the “Indicator” GUI 851, and will not be discussed indetail herein. Each of the GUIs 1040, 1042, 1044, 1046 include a menu1048 to enable the selection of GUIs comprising scenarios specific tothe particular indicator. For example, each of the “Visual” GUI 1040 and“Audible” GUI 1044 include an “Obstructed” GUI 1050, a “Delayed” GUI1052, a “Locked Out” GUI 1054, an “In Motion” GUI 1056 and an“Overweight” GUI (not shown) to enable the operator to specify the lookor sound associated with those compartment 24 characteristics.

With continued reference to FIG. 57, the “Obstructed” GUI 1050 for the“Visual” GUI 1040 includes a first or “Solid or Flashing?” selector box1060 and a second or “Chose the Color” selector box 1062. The “Solid orFlashing?” selector box 1060 includes a first or “Solid” radio button1064 and a second or “Flashing” radio button 1066 to enable the operatorto select the output from the LEDs 52 of the indicator surface 50. Ifthe operator selects the “Flashing” radio button 1066, the “Chose theColor” selector box 1062 includes a plurality of color drop-down menus1068 and a plurality of duration selectors 1069. The color drop-downmenus 1068 enable the operator to select the desired output color andoutput sequence associated with the particular scenario, and if theoutput is selected as flashing, the duration of the interval betweenflashes in milliseconds (ms) can be set. For example, as shown in FIG.57, the visual output for an obstructed compartment 24 is blue (LED 56b), no light, red (LED 56 a), no light, blue (LED 56 b), no light, red(LED 56 a) flashing at 1000 ms intervals.

A further example is illustrated with reference to FIG. 58. In FIG. 58,the “Locked Out” GUI 1054 for the “Visual” GUI 1040 includes the “Solidor Flashing?” selector box 1060, and a “Chose the Color” selector box1062′. The “Chose the Color” selector box 1062′ lists a plurality ofavailable colors for the LEDs 52, which can be selected by the operatorto visually indicate that the compartment 24 is locked out. For example,as shown in FIG. 58, if the compartment 24 is locked out, the red LED 56a will be illuminated.

With reference to FIG. 59, an example of the “Tactile” GUI 1042 isshown. The “Tactile” GUI 1042 includes a scroll bar 1070 to enable theoperator to set the amplitude associated with the tactile feedback. Thetactile feedback is associated with the switch system 40 and theamplitude of mechanical feedback produced when the user interacts withthe OPEN and CLOSE buttons 46, 48 of the switch system 40.

With reference to FIG. 60, an example of the “Obstructed” GUI 1050 ofthe “Audible” GUI 1044 is shown. The “Obstructed” GUI 1050 of the“Audible” GUI 1044 includes a “Warning Type” selector box 1072. The“Warning Type” selector box 1072 includes a first or “Announce” radiobutton 1078 and a second “Warning Bell” radio button 1080. The “WarningBell” radio button 1080, if selected, sounds a warning bell. The“Announce” radio button 1078, if selected, sounds a message. If the“Announce” radio button 1078 is selected, then the “Obstructed” GUI 1050of the “Audible” GUI 1044 includes a “Volume” scroll bar 1074 and a“Announcement Text” text box 1076. The “Volume” scroll bar 1074 enablesthe operator to select the volume for the announced message, and the“Announcement Text” text box 1076 enables the operator to enter thedesired message for announcement.

With reference to FIG. 38, the top display 808 of the “Bin Control” GUI796 includes a clock 1082, a warning display 1084 and a useridentification box 1086. The clock 1082 displays the current time. Thewarning display 1084 displays a notification that indicates the warningis active 1085 and the warning timer 1087. The notification can includetext such as “No Smoking Fasten Seatbelt” as shown, or could include asymbol. The user identification box 1086 displays the name of the loggedin user. For example, in FIG. 45, the logged in user's identification is“John Doe”.

The “Bin Control” GUI 796 also includes the end program button 809 andthe indicator box 810, as shown in FIG. 38. The end program button 809terminates the program. The indicator box 810 displays the currentreal-time location of the selected compartment 24 between the opened andclosed positions.

With reference to FIG. 61, the “Cabin Settings” GUI 800 of the GUI 248is illustrated. The “Cabin Settings” GUI 800 is an example of otherfeatures that can be controlled by the compartment control software. The“Cabin Settings” GUI 800 includes a first or “Cabin Lighting” selectorbox 1088, a second or “Cabin Temperature” selector box 1090 and a“Fasten Seatbelt Grace Period” selector box 1092. The “Cabin Lighting”selector box 1088 includes a first or “Day” radio button 1094 and asecond or “Night” radio button 1096. These radio buttons 1094, 1096control the brightness of the lights in the cabin 14 of the mobileplatform 10, according to the respective day or night conditions. The“Fasten Seatbelt Grace Period” selector box 1092 includes a text box1098, a first or “Minutes” radio button 1100 and a second or “Seconds”radio button 1102. The text box 1098 enables the operator to input thedesired delay, and then select the desired unit for the delay in secondsor minutes via the radio buttons 1100, 1102. This delay represents theamount of time, or grace period, after the crew turns on the warningsignal before compartments 24 are locked down for safety reasons. The“Cabin Temperature” selector box 1090 includes a scroll bar 1104 toenable the operator to adjust the temperature of the cabin 14 of themobile platform 10.

With reference now to FIGS. 62 and 63, an alternative switch system 40′is shown. The switch system 40′ can be mounted to the front surface 44of the compartment 24, and can be sized such that the switch system 40′is retained entirely within the material thickness of the compartment 24and thus, not visible from the interior surface 110 of the compartment24 (not specifically shown). The switch system 40′ can also be mountedwith or without a bezel 1999. The switch system 40′ includes anindicator surface 1200 disposed over and in communication with a controlsystem or printed circuit board (PCB) 1202. The indicator surface 1200displays indicator data 236 received by the PCB 1202, as will bediscussed herein.

With additional reference to FIGS. 64, 65 and 66, the indicator surface1200 includes a first indicator panel 1204, a second indicator panel1206, a first user input device 1208 and a second user input device1210. The first indicator panel 1204 and first user input device 1208are each disposed at a first end 1211 of the indicator surface 1200,while the second indicator panel 1206 and second user input device 1210are each disposed at a second end 1213 of the indicator surface 1200.The indicator surface 1200 is elliptical in shape, however, any othershape could be employed. The indicator surface 1200 is illustrated as anintegral assembly, but the first and second user input devices 1208,1210 could be formed separately and coupled to the indicator surface1200. Preferably, the indicator surface 1200 is formed of a polymericmaterial, such as a silicon-based polymeric material, which is coupledto the PCB 1202. The indicator surface 1200 can be coupled to the PCB1202 with an adhesive, such as a silicon-based cement, and includes anedge configured to engage an outer edge of the PCB 1202 to furtherassist in coupling the indicator surface 1200 to the PCB 1202. It shouldbe noted that although the indicator surface 1200 is described herein asbeing comprised of first and second indicator panels 1204, 1206, andfirst and second user input devices 1208, 1210, any number of indicatorpanels and user input devices could be employed. In addition, the layoutof the first and second indicator panels 1204, 1206 and a first andsecond user input devices 1208, 1210 described herein is forillustration purposes only, and is not intended to limit the scope ofthe present disclosure.

The first and second indicator panels 1204, 1206 are each generallycontoured to match the shape of the first end 1211, and second end 1213,of the indicator surface 1200, and thus, are U-shaped. The first andsecond indicator panels 1204, 1206 are substantially translucent, suchthat light energy from specific, light generating components of the PCB1202 are able to pass through and illuminate the first and secondindicator panels 1204, 1206, as will be described herein. Preferably,the first and second indicator panels 1204, 1206 are configured suchthat light energy is emitted in an arcute area surrounding the first andsecond user input devices 1208, 1210, and covers an area ofapproximately 120 degrees, however, any shape or configuration could beemployed, as shown in FIG. 63. The first user input device 1208 isdisposed adjacent to the first indicator panel 1204 at the respectivefirst end 1211, and the second user input device 1210 is locatedadjacent to the second indicator panel 1206 at the second end 1213 ofthe indicator surface 1200.

The first and second user input devices 1208, 1210 are preferablyintegrally formed with the first and second indicator panels 1204, 1206,but are slightly raised from the indicator surface 1200 such that anoperator can locate the first and second user input devices 1208, 1210by feel. It should be noted, however, that the first and second userinput devices 1208, 1210 could be discrete switch contacts, for example,that could be coupled individually to the indicator surface 1200. Thefirst and second user input devices 1208, 1210 are movable from a first,raised (un-depressed) state 1209 to a second, depressed state 1215 by anoperator (FIGS. 62, 65).

Depressing the first and second user input devices 1208, 1210 changes aswitch state of the device to generate a respective operational commandsignal. For example, depressing the first user input device 1208 enablesa user to send an operational signal that the compartment 24 is to bemoved into the closed position, while the second user input device 1210can be used to allow the user to command the compartment 24 be movedinto the opened position. Thus, depressing either of the first andsecond user input devices 1208, 1210 will send a correspondingoperational signal to the PCB 1202 that a request has been made by theuser to move the compartment 24 into the opened or closed position.Thus, in effect, the first user input device 1208 is equivalent to theCLOSE button 48, and the second user input device 1210 is equivalent tothe OPEN button 46 (FIG. 4). In addition, as discussed, the first andsecond user input devices 1208, 1210 can also enable a user to input thepredetermined crew code for access to restricted compartments 24.

When depressed, the first and second user input devices 1208, 1210provide a tactile and an audible signal to the operator, such as a“click” or “pop,” due to the material used to form the first and seconduser input devices 1208, 1210. Further, the material used to form thefirst and second user input devices 1208, 1210 is preferably of the typethat will enable the first and second user input devices 1208, 1210 toremain in the depressed state 1215 for the duration of a depression bythe user. In addition, when one of the user input devices 1208 or 1210is depressed, additional light energy from a corresponding lightgenerating component on the PCB 1202 passes through its associatedindicator panel 1204 or 1206 to form an additional visual indicator thatthe selected user input device 1208 or 1210 has been depressed.Generally, the intensity of the light energy provided by the control PCB1202 is increased by the PCB 1202 to provide a brighter visual indicatorthat either one of the first and second user input devices 1208 or 1210has been depressed.

The first and second user input devices 1208, 1210 are generallyconfigured to be opaque when they are in the first, raised (i.e.,un-engaged) state 1209, such that no tangible light energy from the PCB1202 can pass therethrough. But when placed in the depressed state 1215,the combination of the additional light energy from the PCB 1202 used toilluminate the first indicator panel 1204, and the depressed first userinput device 1208, in this embodiment, forms an arrow (pointing upwardlyto the right in FIG. 65, as indicated by reference numeral 1214).Conversely, the light that illuminates the second indicator panel 1206and the second user input device 1210, when second user input device1210 is depressed, forms an arrow pointing in the opposite direction.When the switch system 40′ is mounted on the front surface 44 of thecompartment 24, panel 1204 and input device 1208 cooperatively can forman upwardly pointing arrow, while input device 1210 and panel 1206 canform a downwardly pointing arrow.

With reference to FIGS. 62A-70 the PCB 1202 is shown in greater detail.The PCB 1202 includes the circuitry required to operate the switchsystem 40′ and to enable the display of indicator data based on thelocal and remote inputs, as will be discussed herein. Referringspecifically to FIGS. 68A and 68B, the PCB 1202 includes a first side1215 and a second side 1217. The first side 1215 includes a first orCLOSE switch contact 1219, a second or OPEN switch contact 1221, and atleast one, but more preferably a plurality, of light sources or LEDs 52.The second side 1217 includes a first or positive polarity connection1216, a second or ground connection 1218, and a third or sensorconnection 1220. The positive polarity connection 1216, groundconnection 1218 and sensor connection 1220 are electrically coupled tothe PCB 1202 via conductive pins (e.g., standoffs) 1223 (FIG. 63) thattransfer power and/or data signals between the second side 1217 of thePCB 1202 and the respective connection 1216, 1218, 1220 (FIG. 63).Nonconductive covers 1225 are placed over the conductive pins 1223 toprevent a user from contacting the conductive pins 1223.

Referring to FIG. 64, generally, the indicator surface 1200 is coupledto the first surface 1209 of the PCB 1202 such that the first user inputdevice 1208 is disposed over the CLOSE switch 1219 and the second userinput device 1210 is disposed over the OPEN switch 1221. The OPEN andCLOSE switches 1219, 1221 can be any suitable switch, and preferably areconfigured with a raised portion 1227 that, when depressed, completes aswitch contact circuit, as is generally known, as best shown in FIG.62A. A suitable switch is available from GM Nameplate of Seattle, Wash.

The LEDs 52 are coupled to the longitudinal ends of the PCB 1202,beneath the first and second indicator panels 1204, 1206, such that theLEDs 52 can illuminate the first and second indicator panels 1204, 1206,as shown in FIGS. 62A, 63B, and 64. Preferably, the LEDs 52 comprisethree first LEDs 52 a, which may be red in color, and three second LEDs52 b, which may be blue in color, however, any color scheme could beemployed (FIG. 67). It should be noted, that although the use of LEDs isdescribed herein, any light emitting source, such as a light tube orfiber optics, could be employed. LEDs are particularly desirable,however, because of their long life span and relatively low powerconsumption.

One group of first LEDs 52 a and one group of second LEDs 52 b arearranged as pairs, in an arcuate pattern, around a first end 1222 of thePCB 1202 (FIG. 67). Another group of first LEDs 52 a and a group ofsecond LEDs 52 b are also arranged as pairs, in an arcuate pattern,around a second end 1224 of the PCB 1202. When either one of a given LED52 a, 52 b is illuminated, a uniform color light output is providedthrough its associated indicator panel 1204 or 1206 as shown in FIGS. 65and 66. In FIG. 65, the LEDs 52 b are illustrated as illuminated, andthe shading denotes a blue light output. In FIG. 66, the LEDs 52 a areillustrated as illuminated, and the shading denotes a red light output.The LEDs 52 a, 52 b serve as indicators of the status of the compartment24, as discussed previously herein. In addition, as discussed, theintensity of the LEDs 52 a, 52 b can vary based on the lightingconditions in the cabin 14, as controlled by a user through the GUIbased control panel 249, however, any suitable device could be used tocorrelate the intensity of the LEDs 52 to the lighting conditions in thecabin 14, such as optical sensors, for example.

In FIG. 63, the positive polarity connection 1216 provides a connectionpoint for electrical power to be provided to the switch system 40′.Briefly, the switch system 40′ receives power through a conductor 131 athat is coupled to the positive polarity connection 1216 andincidentally coupled to the pivot system 25. In addition, through theconductor 131 a, the switch system 40′ receives indicator data 236 fromthe central controller 32 (remote input) (FIG. 9) via the compartmentcontroller 30, and also transmits operational commands received bymanual or local inputs to the switch system 40′ to the compartmentcontroller 30 for transfer to the central controller 32. The groundconnection 1218 provides the switch system 40′ with a ground connectionvia a conductor 131 a. The polarity connection 1216, ground connection1218, and sensor connection 1220 concurrently serve as an electricalsystem of the switch system 40′ thereby eliminating the need for wiredconnectors.

With further reference to FIG. 63, the sensor connection 1220 enablesthe transfer of power to and data from the obstruction sensor 36 (FIG.5) via a conductor 131 a. The conductor 131 a is coupled to the sensorconnection 1220 and the obstruction sensor 36 (not specifically shown).Thus, the PCB 1202 powers the obstruction sensor 36, and alsofacilitates the transfer of data from the obstruction sensor 36 to thecompartment controller 30 and the central controller 32. Further detailregarding the transfer of data and/or power to the compartmentcontroller 30 and the central controller 32 through the pivot system 25is outside the scope of the current disclosure, but is disclosed ingreater detail in pending commonly assigned U.S. patent application Ser.No. ______ (Attorney Docket No. 7784-000912CPA), filed concurrentlyherewith, entitled “System and Method for Pivot for Stowage Compartmentsor Rotating Items,” which is incorporated by reference herein in itsentirety.

With reference now to FIGS. 69 and 70, the PCB 1202 is shown in detailedelectrical schematic form. The illustration of FIG. 69 shows that whichis visible from the first surface 1209 of the PCB 1202, as viewed fromthe front surface 44 of the compartment 24. FIG. 70 illustrates thecomponents of the PCB 1202 visible from the second surface 1211 of thePCB 1202 (i.e., as viewed from the interior surface 110 of thecompartment 24). Referring to FIG. 69, the PCB 1202 includes a powermodule or circuit 1228, a receive module or circuit 1230, a transmitmodule or circuit 1232, and a LED module or circuit 1234.

The power circuit 1228 receives the power from the conductor 131 a andconverts it into a regulated power output for the receive circuit 1230and the transmit circuit 1232. The power circuit 1228 includes a powergenerating subsystem 1228 a, a power protection subsystem 1228 b, afilter 1228 c, and a power conditioning subsystem 1229. The powergenerating subsystem 1228 a forms a conventional regulated power supplythat generates a regulated +5 volts (across circuit points 1228 a 1 and1228 a 2), which is used to power the various integrated circuitcomponents on the PCB 1202. The power protection subsystem 1228 b is aconventional circuit that prevents current flow into the filter 1228 c.

The power conditioning circuit 1229 provides power to pins of theintegrated circuits on the PCB 1202, such as in the receive circuit 1230and includes logic gates in communication with any unused pins in thedigital chips on the PCB 1202 to prevent interference from the unusedpins, as is generally known. The power conditioning circuit 1229 alsoincludes the filter 1228 c. The filter 1228 c is a conventional filterthat provides a filtered +0 v output across points 1229 e and 1229 f ifno data is transmitted over the positive polarity connection 1216. Thus,the filter 1228 c blocks the direct current component from the positivepolarity connection 1216 and enables the extraction of data from thesupplied power. The data extracted by the filter 1228 c is transmittedto the receive circuit 1230.

The receive circuit 1230 includes a communication over power lines(COPL) processor 1236. The receive circuit 1230 converts the dataextracted from the filter 1228 c into +5 v and 0 v logic that isinterpreted by the COPL processor 1236. The COPL processor 1236 is adirect current (DC) COPL processor commercially available from YamarElectronics Ltd. of Tel Aviv, Israel. The COPL processor 1236 receivesboth the power and any indicator data 236 from the compartmentcontroller 30 via the conductors 131, 131 a and converts the indicatordata into signals that are used by the COPL processor 1236 to drive theLED circuit 1234. Based on the signals generated from the indicator data236, the COPL processor 1236 transmits signals to the LED circuit 1234to selectively illuminate the LEDs 52 a, 52 b accordingly.

The COPL processor 1236 also transmits over the conductors 131 a inputdata from the obstruction sensor 36 received via the conductor 131 a tothe compartment controller 30 via the conductors 131 a, 131. Inaddition, the COPL processor 1236 receives as input signals thedepression of either of the first or second user input devices 1208,1210 (i.e., a local input). The depression of the first or second userinput devices 1208, 1210 generates the operational signal that a requestto move the compartment 24 into the opened or closed positions has beenmade. Once the operational signal is received by the COPL processor1236, the COPL processor 1236 provides an increased magnitude currentsignal to the respective LEDs 52 a, 52 b on the LED circuit 1234 toincrease the intensity of the illumination of the LEDs 52 a, 52 b. Thisprovides a visual indicator that one of the first and second user inputdevices 1208, 1210 has been depressed.

Further, the operational signal generated from the depression of eitherthe first or second user input devices 1208, 1210 is transmitted by theCOPL processor 1236 over the conductors 131 a, 131 to the compartmentcontroller 30. The compartment controller 30 transmits compartmentstatus data 238 to the central controller 32 indicating that a requestto move the compartment 24 into the opened or closed position has beenmade. If the compartment 24 is able to move (i.e., not blocked by anobstruction), then the compartment controller 30 transmits indicatordata 236 over the conductors 131 a, 131 indicative of the desiredmovement of the compartment 24, which is received by the COPL processor1236 and used to illuminate the respective LEDs 52 a, 52 b, as describedherein. If the compartment 24 is not able to move, then the compartmentcontroller 30 transmits indicator data 236 to the COPL processor 1236that the compartment 24 is unable to move, as also described herein.

The transmit circuit 1232 is in communication with the COPL processor1236 of the receive circuit 1230. The transmit circuit 1232 receivesdata from the COPL processor 1236 and modulates this data onto thepositive polarity connection 1216 using logic gates to amplify signalswhile also blocking incoming data signals that should be received by thereceive circuit 1230.

Thus, the switch system 40′ provides an easy to use and aestheticallypleasing system for enabling users to conveniently control opening andclosing of a compartment 24. Advantageously, the switch system 40′provides both a visual signal and a tactile signal to the user toconfirm for the user whether opening or closing of the compartment 24has been selected.

With reference now to FIG. 71, an alternative latching system 28 a isshown. The alternative latching system 28 a includes the latch pin orpin 158, a receiver assembly 160 a, the manual release 163 and a latchcontrol system or latch controller 1300 for use with the compartment 24described with regard to FIGS. 1-70. As will be appreciated, theremainder of the compartment 24 employed with the alternative latchingsystem 28 a is similar to that which is illustrated in and described inconjunction with FIGS. 1-70. Further, as the pin 158 and the manualrelease 163 of the alternative latching system 28 a are substantiallysimilar to the pin 158 and the manual release 163 of the latching system28, the pin 158 and the manual release 163 will not be discussed indetail with regard to the alternative latching system 28 a. It should befurther noted that the same reference numerals will be used to denotethe same or similar items discussed in regard to FIGS. 1-70.

With additional reference to FIG. 71A, the receiver assembly 160 a ofthe alternative latching system 28 a is shown coupled to the frame 58.The receiver assembly 160 a is shown coupled to the frame 58 via abracket 1301, however, any suitable mounting technique could be employedto couple the receiver assembly 160 a to the frame 58. Alternatively,the receiver assembly 160 a could be coupled to the shell 66, if desired(not shown). As any suitable receiver assembly 160 a could be employedto secure the pin 158, the receiver assembly 160 a will not be discussedin detail herein. Briefly, a suitable receiver assembly 160 a could be aradial fastener receiver assembly 160 a available from Telezygology,Inc. of Chicago, Ill. The radial fastener receiver assembly 160 a caninclude a cylindrical housing 1302 for receipt of the pin 158. Withreference to FIG. 71B, the cylindrical housing 1302 includes teeth 1304,which are operable in a first, engaged position to extend into a bore1306 formed in the cylindrical housing 1302 to secure the pin 158 to thereceiver assembly 160 a. With reference to FIG. 71C, the teeth 1304 areoperable in a second, disengaged position to retract into the bore 1306and release the pin 158 from the cylindrical housing 1302.

Alternatively, the receiver assembly 160 a could be a shape memory alloyradial receiver assembly (not specifically shown), such as thatavailable from Telezygology, Inc. of Chicago, Ill. The shape memoryalloy radial receiver assembly includes a cylindrical shape memory alloyreceiver, which in a first state retains the pin 158, and in a secondstate releases the pin 158 by the application of a current to the shapememory alloy receiver. The current heats the shape memory alloy receivercausing the receiver to expand and release the pin 158. When the currentis removed, the receiver cools to the first state for receipt of the pin158, as is generally known. The shape memory alloy radial receiverassembly 160 a includes a cylindrical shape memory alloy receiver, whichis operable in a first state to retain the pin 158, and is operable in asecond state to release the pin 158, by the application of a current tothe shape memory alloy receiver. The current heats the shape memoryalloy receiver causing the receiver to expand and release the pin 158.When the current is removed, the receiver cools to the first state forreceipt of the pin 158, as is generally known.

The latch controller 1300 of the receiver assembly 160 a is coupled tothe receiver assembly 160 a and is in communication with the switchsystem 40′. The latch controller 1300 could be integrally formed withthe receiver assembly 160 a as shown, or could be a discrete componentmechanically coupled to the receiver assembly 160 a, if desired. Thelatch controller 1300 is in communication with the switch system 40′through a wired connection 1303, but could be in communication with theswitch system 40′ through a wireless connection, such as a Bluetooth(802.15.1), WiFi (802.11), or Zigby (802.15.4) or a conductor 131 a viaCOPL or even via a separate dedicated conductor (not shown). The latchcontroller 1300 is in communication with the switch 40′ to receive asignal that a request to unlatch the compartment 24 has been made viathe switch 40′. In addition, the latch controller 1300 is responsive tothe warning sign, such as the “Fasten Seatbelts” sign, to prevent therelease of the pin 158 from the receiver assembly 160 a. The latchcontroller 1300 can receive notice that the warning sign is activeeither through the compartment controller 30, or the latch controller1300 can be in wireless communication with the central controller 32 forreceipt of a signal that the warning sign is active (not specificallyshown).

Specifically, the latch controller 1300 activates the receiver assembly160 a to release the pin 158 upon receipt of the signal from the switchsystem 40′, or prevents the release of the pin 158. For example, if theOPEN button 46 is depressed, the switch system 40′ transfers a signal,either wirelessly or through the compartment controller 30, to the latchcontroller 1300 that a request to lower the compartment 24 has beenmade. If the latch controller 1300 has not received the signal that thewarning sign is active, then the latch controller 1300 will command orsignal the receiver assembly 160 a to release the pin 158. If the latchcontroller 1300 receives the signal that the warning sign is active,then the latch controller 1300, even upon receipt of the signal from theswitch system 40′, will prevent the release of the pin 158. However, ifthe warning sign is active, and the proper crew code is provided via theswitch system 40′, then the latch receiver 160 a will release the pin158, as discussed previously.

In addition, the latch controller 1300 provides the central controller32 and compartment controller 30 with a real-time status of the receiverassembly 160 a. The latch controller 1300 communicates its status (i.e.latched, unlatched) and any failure of the receiver assembly 160 a tothe compartment controller 30 via the wired connection 1303.Alternatively, the latch controller 1300 could communicate its statuswirelessly through Bluetooth (802.15.1), WiFi (802.11), or Zigby(802.15.4), for example. Thus, the latch controller 1300 provides thesame functionality as the latch sensor 156, but also controls theactivation of the receiver assembly 160 a while monitoring the receiverassembly 160 a for failure.

Based on the input received from the switch system 40′ and the latchcontroller 1300, the compartment controller 30 generates the indicatordata 236 for the switch system 40′, as shown in Table 1. It should benoted that the light output of the LEDs 52 of the indicator surface 1200are merely exemplary, as any appropriate color light output could beemployed, depending upon a desired lighting scheme.

TABLE 1 Exemplary Indicator Surface Outputs for Various CompartmentOperations Operational Action/ Status Indicator User Condition ID#Scenario Position (color) Crew Panel PAX Enabled P1a Latched 0° SolidBlue (NSFSB = 1) P1b Open <X° Flashing Blue (no motion, not latched) P1cOpen >X° Solid Blue (no motion, not latched) P1d Opening 0°–48° FlashingBlue P1c Closing 0°–48° Flashing Blue P1e Impending 0°–48° Flashing BlueMotion due to power delay Disabled P2a Deferment 0°–48° Status remains(NSFFSB = 2) Period ID#'s P1a–P1e Disabled P3a Latched 0° Solid Red(NSFFSB = 3) P3b Open 0°–48° Flashing Red Not (no motion, latched notlatched) signal P3c Opening or 0°–48° Flashing Red Not Closing latchedsignal CRW Enabled C1a Open, 0°–48° Go to ID# P1b–P1e (NSFSB = 1)Opening/ Closing, Impending Motion Disabled C3a Latched 0° Solid Red(NSFFSB = 3) EMR Enabled E1a Bin Latched 0° Solid Red (NSFSB = 1) E1bOpen, 0°–48° Go to ID# P1b–P1e Opening/ Closing, Impending Motion ALLObstruction A1a Opening or 0°–48° Flashing Blue/Red Closing A1b Openingor 0°–48° Flashing Blue/Red Obstr. Closing signal (1–2 attempts <P sec)Obstruction A1c Opening or 0°–48° Flashing Blue/Red Obstr. Closingsignal (>2 attempts <P sec) Overweight A1d Overloaded 0°–48° FlashingBlue/Red Ovrwgt or weight signal unknown TTL - A3 latched 0°–48° Noillumination Disabled* TTL - A3 not latched 0°–48° Flashing Red NotDisabled* latched signal

In Table 1, the user “PAX” refers to operation of the compartment 24 bythe passenger of the mobile platform 10, user “CREW” refers to operationof the compartment 24 by a crew member, for a compartment 24 that hasaccess restricted to crew members, the user “EMER” refers to the use ofthe compartment 24 during an emergency situation, and the user “ALL”refers to output of the indicator surface 1200 during the use of thecompartment 24 by all users. The column entitled “Crew Panel” can referto the display on the GUI control panel 249.

With reference now to FIGS. 74A-74E, it should be noted that the switchsystem 40′ employed with the latching system 28 a could be analternative switch system 40′″, as shown in FIG. 74A. The alternativeswitch system 40″ is similar to the switch system 40′, however, insteadof two switch contacts, the switch system 40″ includes one switchcontact 1308 that could be sized the same as the switch system 40′, orcould be smaller than the switch system 40′, as shown in FIG. 74D. Asthe functionality of the switch contact 1308 and the switch system 40″is the same as the switch contacts 1219, 1221 and the switch system 40′discussed with regard to FIGS. 62-70, the switch contact 1308 and theswitch system 40″ will not be discussed in great detail herein. Briefly,however, as one switch contact 1308 is employed with the switch system40″, an indicator surface 1200″ of the switch system 40″ can includevarious configurations of indicator panel(s) 1310.

As shown in FIG. 74A, the indicator surface 1200″ includes two indicatorpanels 1310, similar to the indicator panels of the switch system 40′,to enable the light energy from the LEDs 52 a, 52 b to passtherethrough. With reference to FIG. 74B, one indicator panel 1310 isemployed that extends around a circumference of the switch contact 1308to enable the light energy from the LEDs 52 a, 52 b to passtherethrough. As shown in FIG. 74C, the surface of the switch contact1308 could itself be the indicator panel 1310, and thus, the area of theindicator surface 1200″ covering the switch contact could be translucentto enable the light energy from the LEDs 52 a, 52 b to passtherethrough. In FIG. 74D, the smaller switch system 40″ is shown toinclude an indicator panel that extends around a circumference of theswitch contact 1308, for enabling the light energy from the LEDs 52 a,52 b to pass therethrough. Alternatively, as shown in FIG. 74E, thesurface of the switch contact 1308 of the smaller switch system 40″ isemployed as the indicator panel 1310, and thus, the area of theindicator surface 1200″ covering the switch contact is translucent toenable the light energy from the LEDs 52 a, 52 b to pass therethrough.

With reference now to FIG. 75, an alternative compartment system 12 b isshown. The alternative compartment system 12 b is manually operated, andcan be used in a mobile platform 10 in conjunction with thepower-assisted compartment system 12, or mobile platform 10 could employjust the alternative compartment system 12 b, if desired (not shown). Asthe alternative compartment system 12 b is similar to the power-assistedcompartment system 12 discussed with regard to FIGS. 1-74, the samereference numerals will be used to denote the same or similarcomponents.

With additional reference to FIG. 76, the compartment system 12 bincludes a control system 20 b, the support system 22, the compartments24, a latching system 28 b, and a display 1318. As the support system 22and the compartments 24 of the compartment system 12 b are substantiallysimilar to the support system 22 and compartments 24 of the compartmentsystem 12 discussed with regard to FIGS. 1-70, with the exception of thesize, shape and orientation of the opened and closed positions, thesupport system 22 and compartments 24 of the compartment system 12 bwill not be discussed in great detail herein. In addition, the supportsystem 22 and compartments 24 as illustrated herein are of the typegenerally known in the art.

The control system 20 b includes the central controller 32 and a switchsystem 40′″. The control system 20 b is in communication with thelatching system 28 b, as will be discussed herein. Generally, thecentral controller 32 is in communication with the latching system 28 bthrough a wireless protocol, however, the central controller 32 couldalso be in communication with the latching system 28 b through a wiredconnection, such as COPL through the use of conductors 131 a, forexample, or even via a separate dedicated conductor, as will bediscussed herein. It should be noted that although the centralcontroller 32 is shown in FIG. 75 with a GUI screen 249, any appropriatecentral controller 32 could be employed as discussed previously herein.The central controller 32 is also in communication with the display1318, as will be discussed in greater detail herein.

With additional reference to FIG. 76, the control system 20 b alsoincludes the switch system 40′″. The switch system 40′″ communicateswith the latching system 28 b to provide the latching system 28 b with asignal that a request to unlatch the compartment 24 has been made. Theswitch system 40′″ is similar to the switch system 40′, and includes afirst user input device 1320, second user input device 1322 and a PCB1324 (not specifically shown). The first and second user input devices1320, 1322 can be identical to the first and second user input devices1208, 1210 of the switch system 40′, however, any suitable switchcontact could be employed. In addition, only one of the first and seconduser input devices 1320, 1322 could be employed, if desired, asdiscussed herein with regard to FIGS. 74A-74E. If, however, the firstand second user input devices 1320, 1322 are employed, then the switchsystem 40′″ can be used as a combination lock to restrict access to thecompartment 24. In particular, the depression of the first and seconduser input devices 1320, 1322 in the predefined crew code pattern couldenable the compartment 24 to be opened by authorized users only, asdiscussed previously herein. Further, if only one user input device 1320or 1322 is employed, a sequence of hold times for the depression of theuser input device 1320 or 1322 (i.e., short depression, long depression,long depression, short depression) could be employed as a combinationlock to restrict access to the compartment 24.

The first and second user input devices 1320, 1322 are coupled to thePCB 1324. The PCB 1324 enables the transmission of the signal to thelatching system 28 b that either of the first and second user inputdevices 1320, 1322 has been depressed, indicating that a request tounlatch the compartment 24 has been made. Preferably, the PCB 1324transmits the signal to the latching system 28 b through a suitablewireless protocol 1325, such as Bluetooth (802.15.1), WiFi (802.11), orZigby (802.15.4), however, the PCB 1324 could transmit the signal usingCOPL through a conductor 131 a, for example, as discussed with regard toswitch system 40′ or even via a separate dedicated conductor (notshown).

It should be noted that the switch system 40′″ does not include anindicator surface as described with regard to the switch system 40′. Asthe switch system 40′″ does not include an indicator surface, the switchsystem 40′″ could be an energy harvesting switch, such as an inductiveor piezoelectric switch that is capable of self-generating energy tosend the wireless signal to the latching system 28 b. A suitable energyharvesting switch is commercially available from EnOcean GmbH, ofOberhaching, Germany.

The latching system 28 b is in communication with the switch system 40′″of the control system 20 b to receive the signal that a request has beenmade to unlatch the compartment 24. Preferably, one latching system 28 bis coupled to a first sidewall 106 a of the compartment 24 and anotherlatching system 28 b is coupled to a second sidewall 106 b of thecompartment 24 (best shown in FIG. 75), however, any number of latchingsystems 28 b, including only one latching system 28 b, could beemployed. Generally, one of the latching systems 28 b will serve as themaster latching system 28 b′, and will be in communication with theswitch system 40′″ for receipt of the signal to unlatch the compartment24. The master latching system 28 b′ will also be in communication witha slave latching system 28 b″ to instruct the slave latching system 28b″ to unlatch upon receipt of the signal from the switch system 40′″.The master latching system 28 b′ can be in wireless communication withthe slave latching system 28 b″, or could communicate with the slavelatching system 28 b″ through a wired connection, such as COPL or evenvia a separate dedicated conductor. It should be noted, however, thatthe latching systems 28 b could be independently in communication withthe switch system 40′″ to receive the signal to unlatch the compartment24.

With reference to FIGS. 76-79, the latching system 28 b is shown insimplified form. It will be appreciated that any suitable electronicallycontrolled latching system 28 b could be employed with the compartment24. An exemplary latching system 28 b, for example, could include alatch pin 1326, a telescoping arm 1328, a manual release 1330 and thereceiver assembly 160 a. The latch pin 1326 is coupled to thetelescoping arm 1328, and is configured to be received in the receiverassembly 160 a to secure the compartment 24 in the closed position. Thetelescoping arm 1328 is coupled to the receiver assembly 160 a and thesidewall 106 of the compartment 24 to enable the compartment 24 to pivotfrom the closed position (FIG. 77) to the opened position (FIG. 79) uponthe release of the latch pin 1326 from the receiver assembly 160 a. Themanual release 1330 is coupled to the receiver assembly 160 a to enablethe release of the latch pin 1326 from the receiver assembly 160 a, andcan be similar to the manual release 163 of the latching system 28.

With regard to the receiver assembly 160 a, as the receiver assembly 160a was discussed with regard to FIGS. 71-74E, it will not be discussed indetail with regard to compartment 24. Briefly, however, the receiverassembly 160 a is coupled to the support system 22 to enable thecompartment 24 to pivot with respect to the support system 22 into theopened and the closed positions. The receiver assembly 160 a used withthe alternative compartment system 12 b includes the latch controller1300. Generally, the latch controller 1300 is in communication with theswitch system 40′″ of the control system 20 b. The latch controller 1300is preferably in communication with the switch system 40′″ through thewireless connection 1325, but could be in communication with the switchsystem 40′″ through a suitable wired connection, such as through aconductor 131 a (not shown).

The latch controller 1300 activates the receiver assembly 160 a torelease the pin 158 upon receipt of a signal from the switch system40′″, or prevents the release of the pin 158. For example, if either offirst and second user input devices 1320, 1322 is depressed, the switchsystem 40′″ transfers a signal wirelessly to the latch controller 1300that a request to lower the compartment 24 has been made. If the latchcontroller 1300 has not received a signal that the warning sign isactive, then the latch controller 1300 will command or activate thereceiver assembly 160 a to release the locking stud 1326. If the latchcontroller 1300 receives a signal that the warning sign is active, thenthe latch controller 1300, even upon receipt of the signal from theswitch system 40′″, will prevent the release of the locking stud 1326.However, if the warning sign is active, and the proper crew code isprovided via the first and second user input devices 1320, 1322 of theswitch system 40′″, then the receiver assembly 160 a will release thelocking stud 1326, as discussed previously. It should be noted, however,that any suitable mechanism could be used to enable the latch controller1300 to respond to the warning signal, such as an independent controllerin communication with the latch controller 1300 (not shown).

In this embodiment, the latch controller 1300 provides the centralcontroller 32 with a real-time status of the receiver assembly 160 a.With reference to FIG. 75, the latch controller 1300 communicates itsstatus (i.e. latched, unlatched) and any failure of the receiverassembly 160 a, either wirelessly via a wireless connection 1327, suchas Bluetooth (802.15.1), WiFi (802.11), or Zigby (802.15.4), or over theconductor 131 a to the central controller 32 (not shown). Then, based onthe input received from the latch controller 1300, the centralcontroller 32 generates indicator data 236 b for the display 1318.

With continuing reference to FIG. 75, the display 1318 is arranged to bevisible in the cabin 14 of the mobile platform 10, and can be mounted toa trim panel 1338 coupled to the support system 22. Generally, thedisplay 1318 comprises at least one, or a plurality of LEDs 52 coupledto a PCB (not shown) that can display the status of the compartments 24,similar to the first and second indicator panels 1204, 1206 of theswitch system 40′. Alternatively, the display 1318 could be a liquidcrystal display (LCD) display or any other suitable display. Generally,the display 1318 is in wired communication with the central controller32, through COPL for example, however, the display 1318 could be inwireless or another form of wired communication with the centralcontroller 32 for receipt of the indicator data 236 b, while receivingpower from a secondary source, such as the pivot system 25 (not shown).Exemplary light output for the display 1318 of the compartment system 12b is provided in Table 2. It should be noted that the light output ofthe LEDs 52 of the display 1318 are merely exemplary, as any appropriatecolor light output could be employed, depending upon a desired lightingscheme.

TABLE 2 Exemplary Display Output for Various Compartment Operations BinOperational Action/ Status Indicator User Condition ID# Scenario (color)Crew Panel PAX Enabled P1a Bin Latched Solid Blue (NSFSB = 1) P1b BinOpen Flashing Blue (not latched) (1 per sec until next action) DisabledP2a Deferment Status remains ID#'s (NSFFSB = 2) Period P1a–P1e DisabledP3a Bin Latched Solid Red (NSFFSB = 3) P3b Bin Open Flashing Red Notlatched (not latched) (1 per sec until “bin signal latched” or ID# 12)CRW Enabled C1a Open Go to ID# P1b—P1b (NSFSB = 1) Disabled C3a BinLatched Solid Red (NSFFSB = 3) EMR Enabled E1a Bin Latched Solid Red(NSFSB = 1) E1b Open ALL TTL - A1 Bin latched No illumination Disabled*TTL - A2 Bin not latched Flashing Red Not latched Disabled* signal

In Table 2, the user “PAX” refers to operation of the compartment 24 bythe passenger of the mobile platform 10, user “CREW” refers to operationof the compartment 24 by a crew member, for a compartment 24 that hasaccess restricted to crew members, the user “EMER” refers to the use ofthe compartment 24 during an emergency situation, and the user “ALL”refers to output of the indicator surface 1200 during the use of thecompartment 24 by all users. The column entitled “Crew Panel” can referto the display on the GUI control panel 249.

Thus, the latching system 28 a, 28 b provides a robust system forenabling users to conveniently control opening and closing of acompartment 24. Advantageously, the latching system 28 a, 28 b isresponsive to warning signal to prevent the release of the compartment24, thereby providing an additional layer of protection against therelease of the compartment 24 when the warning sign is active.

While specific examples have been described in the specification andillustrated in the drawings, it will be understood by those of ordinaryskill in the art that various changes may be made and equivalents may besubstituted for elements thereof without departing from the scope of thepresent disclosure as defined in the claims. Furthermore, the mixing andmatching of features, elements and/or functions between various examplesis expressly contemplated herein so that one of ordinary skill in theart would appreciate from this disclosure that features, elements and/orfunctions of one example may be incorporated into another example asappropriate, unless described otherwise, above. Moreover, manymodifications can be made to adapt a particular situation or material tothe teachings of the present disclosure without departing from theessential scope thereof. Therefore, it is intended that the presentdisclosure not be limited to the particular examples illustrated by thedrawings and described in the specification as the best mode presentlycontemplated for carrying out this disclosure, but that the scope of thepresent disclosure will include any embodiments falling within theforegoing description and the appended claims.

1. A method for controlling at least one moveable stowage compartmentcomprising: providing a motive device operably associated with thecompartment; computing a required current supplied to the motive deviceto move the compartment; determining if the computed required currentexceeds a threshold; and determining that the compartment is obstructedif the computed required current exceeds the threshold.
 2. The method ofclaim 1, wherein determining if the computed required current exceeds athreshold further comprises: providing a maximum allowable current; andsignaling that the computed required current exceeds the threshold ifthe computed required current is greater than the maximum allowablecurrent.
 3. The method of claim 1, wherein determining if the computedrequired current exceeds a threshold further comprises: providing amaximum allowable change in the computed required current; and signalingthat the computed required current exceeds the threshold if a change inthe computed required current is greater than the maximum allowablechange in the computed required current.
 4. The method of claim 1,further comprising: reversing smoothly a polarity of the computedrequired current supplied to the motive device if the computed requiredcurrent exceeds a threshold.
 5. The method of claim 1, furthercomprising: sensing a position of the compartment; computing a change inposition of the compartment for a predefined period of time; computing aweight of the compartment by using the change in the position of thecompartment and the computed required current; and signaling if theweight of the compartment exceeds a threshold weight limit.
 6. Themethod of claim 4, wherein calculating the weight of the compartmentbased on a change in position of the compartment further comprises:computing an open angle of the compartment based on the change inposition of the compartment relative to surrounding fixed structureoperably associated with the compartment; computing the effective momentarm of the compartment; and computing the applied torque associated withthe moment arm.
 7. A method for monitoring a movable stowage compartmenton a mobile platform comprising: providing a motor coupled to thecompartment; computing a current required to be supplied to the motor;sensing a position of the compartment; computing a change in position ofthe compartment for a predefined period of time; computing the weight ofthe compartment based on the change in position of the compartment andthe computed required current; and signaling if the weight of thecompartment exceeds a weight limit threshold.
 8. The method of claim 7,further comprising: determining if the compartment is obstructed basedon the computed required current; and signaling that the compartment isobstructed if the computed required current sharply exceeds a threshold.9. The method of claim 8, wherein determining if the compartment isobstructed based on the computed required current further comprises:providing a maximum allowable current; and signaling that the computedrequired current exceeds the threshold if the computed required currentis greater than the maximum allowable current.
 10. The method of claim8, wherein determining if the compartment is obstructed based on thecomputed required current further comprises: providing a maximumallowable change in the computed required current over a predeterminedtime; and signaling that the computed required current exceeds thethreshold if a change in the computed required current is greater thanthe maximum allowable change in the computed required current.
 11. Themethod of claim 8, further comprising: reversing smoothly a polarity ofthe computed required current supplied to the motor if the computedrequired current exceeds a threshold.
 12. The method of claim 7, whereincalculating the weight of the compartment further comprises: computingan open angle of the compartment based on the position of thecompartment relative to fixed structure operably associated with thecompartment; computing the effective moment arm of the compartment as aresult of a weight of the compartment; and computing a torque beinggenerated by the compartment using the open angle and the moment arm.13. A method for controlling the operation of a moveable overheadstowage compartment on a mobile platform comprising: determining aposition of the compartment from a location remote from the compartment;determining a status of the compartment from the remote location; andgenerating signals from the remote location to a motive deviceassociated with the compartment to move the compartment based on thesensed position and the status of the compartment.
 14. The method ofclaim 13, wherein moving the compartment based on the status of thecompartment further comprises: sensing if the compartment is obstructed;and controlling a polarity of a current applied to the motive device tosmoothly reverse the direction of the compartment.
 15. The method ofclaim 13, wherein moving the compartment based on the sensed positionand status of the compartment further comprises: providing a switch incommunication with the compartment; sensing an input from the switch;and moving the compartment into an opened position or a closed positionbased on the sensed position of the compartment if the compartment isnot obstructed.
 16. The method of claim 15, wherein moving thecompartment based on the status of the compartment further comprises:determining if the compartment is in the closed position; determining ifthe compartment status indicates that the compartment has restrictedaccess if the compartment is in the closed position; if the compartmenthas restricted access, sensing an input indicative of a code to gainaccess to the compartment; and moving the compartment into the openedposition if the input provides a predetermined code.
 17. The method ofclaim 16, further comprising: providing a switch in communication withthe compartment, the switch comprising a first user input device and asecond user input device; and inputting the predetermined code using theuser input devices, the predetermined code comprising a sequence ofinputs from the first user input device and the second user inputdevice.
 18. The method of claim 17, further comprising: preventing theoperation of the compartment if the sequence of inputs from the firstuser input device and the second user input device do not provide thepredetermined code.
 19. The method of claim 13, wherein moving thecompartment based on the sensed position and status of the compartmentfurther comprises: providing a warning sign in the mobile platformindicative of a fasten seatbelts condition; sensing if the warning signis active; initiating a timer associated with the warning sign;determining if the compartment status is set to restricted access inwhich access to the compartment is restricted to an authorized member ofthe mobile platform; and preventing the movement of the compartment intothe opened position on the expiration of the timer if the compartment isin the closed position and the compartment status is not set torestricted access.
 20. The method of claim 19, further comprising:providing a switch in communication with the compartment; inputting apredetermined code using the switch within a predetermined amount oftime; and moving the compartment into the opened position if thecompartment is in the closed position and the compartment status is setto restricted access upon receipt of a user input from the switch thatmatches the predetermined code entered within the predetermined amountof time.
 21. An aircraft comprising: a fuselage; an overhead stowagecompartment located within the fuselage, and movable between an openedposition and a closed position; a motive device operatively associatedwith the compartment for moving the compartment between the opened andclosed positions; a control system located remotely from the compartmentand in communication with the motive device, for generating a current todrive the motive device; and the control system including a subsystem tosense the current driving the motor and using the computed requiredcurrent to determine an operational status of the compartment.
 22. Theaircraft of claim 21, wherein the control system uses a sensed positionof the compartment and the computed required current to determine aweight of the compartment at a given time.